Home / 31,126,032.72-42,948,262.26-21,861,909.36

Finding the Fourth Proportional to 31,126,032.72, 42,948,262.26 and 21,861,909.36

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Solution

The fourth proportional to 31,126,032.72, 42,948,262.26 and 21,861,909.36 is: 30,165,457.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126,032.72 : 42,948,262.26 = 21,861,909.36 : x
  2. Step 2: Convert to fraction form
    31,126,032.72/42,948,262.26 = 21,861,909.36/x
  3. Step 3: Cross multiply
    31,126,032.72x = 42,948,262.26 × 21,861,909.36
  4. Step 4: Simplify right side
    31,126,032.72x = 938,931,016,697,628.62
  5. Step 5: Solve for x
    x = 938,931,016,697,628.62/31,126,032.72
  6. Step 6: Final answer
    x = 30,165,457.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.