Home / 21,121,212,999.60-31,681,819,499.40-10,636,378,081.20

Finding the Fourth Proportional to 21,121,212,999.60, 31,681,819,499.40 and 10,636,378,081.20

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Solution

The fourth proportional to 21,121,212,999.60, 31,681,819,499.40 and 10,636,378,081.20 is: 15,954,567,121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121,212,999.60 : 31,681,819,499.40 = 10,636,378,081.20 : x
  2. Step 2: Convert to fraction form
    21,121,212,999.60/31,681,819,499.40 = 10,636,378,081.20/x
  3. Step 3: Cross multiply
    21,121,212,999.60x = 31,681,819,499.40 × 10,636,378,081.20
  4. Step 4: Simplify right side
    21,121,212,999.60x = 336,979,810,495,952,977,920
  5. Step 5: Solve for x
    x = 336,979,810,495,952,977,920/21,121,212,999.60
  6. Step 6: Final answer
    x = 15,954,567,121.80

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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.