Home / 21,121,212,809.60-31,681,819,214.40-10,636,377,891.20

Finding the Fourth Proportional to 21,121,212,809.60, 31,681,819,214.40 and 10,636,377,891.20

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Solution

The fourth proportional to 21,121,212,809.60, 31,681,819,214.40 and 10,636,377,891.20 is: 15,954,566,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121,212,809.60 : 31,681,819,214.40 = 10,636,377,891.20 : x
  2. Step 2: Convert to fraction form
    21,121,212,809.60/31,681,819,214.40 = 10,636,377,891.20/x
  3. Step 3: Cross multiply
    21,121,212,809.60x = 31,681,819,214.40 × 10,636,377,891.20
  4. Step 4: Simplify right side
    21,121,212,809.60x = 336,979,801,445,039,538,176
  5. Step 5: Solve for x
    x = 336,979,801,445,039,538,176/21,121,212,809.60
  6. Step 6: Final answer
    x = 15,954,566,836.80

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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.