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Finding the Fourth Proportional to 20,908,582.86, 31,355,800.56 and 7,951,655.19

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Solution

The fourth proportional to 20,908,582.86, 31,355,800.56 and 7,951,655.19 is: 11,924,792.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908,582.86 : 31,355,800.56 = 7,951,655.19 : x
  2. Step 2: Convert to fraction form
    20,908,582.86/31,355,800.56 = 7,951,655.19/x
  3. Step 3: Cross multiply
    20,908,582.86x = 31,355,800.56 × 7,951,655.19
  4. Step 4: Simplify right side
    20,908,582.86x = 249,330,514,259,528.91
  5. Step 5: Solve for x
    x = 249,330,514,259,528.91/20,908,582.86
  6. Step 6: Final answer
    x = 11,924,792.60

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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.