Home / 21,121,212,917.60-31,681,819,376.40-10,636,377,999.20

Finding the Fourth Proportional to 21,121,212,917.60, 31,681,819,376.40 and 10,636,377,999.20

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Solution

The fourth proportional to 21,121,212,917.60, 31,681,819,376.40 and 10,636,377,999.20 is: 15,954,566,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121,212,917.60 : 31,681,819,376.40 = 10,636,377,999.20 : x
  2. Step 2: Convert to fraction form
    21,121,212,917.60/31,681,819,376.40 = 10,636,377,999.20/x
  3. Step 3: Cross multiply
    21,121,212,917.60x = 31,681,819,376.40 × 10,636,377,999.20
  4. Step 4: Simplify right side
    21,121,212,917.60x = 336,979,806,589,769,285,632
  5. Step 5: Solve for x
    x = 336,979,806,589,769,285,632/21,121,212,917.60
  6. Step 6: Final answer
    x = 15,954,566,998.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.