Home / 20,812,932.47-28,718,420.64-13,072,461.50

Finding the Fourth Proportional to 20,812,932.47, 28,718,420.64 and 13,072,461.50

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Solution

The fourth proportional to 20,812,932.47, 28,718,420.64 and 13,072,461.50 is: 18,037,844.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812,932.47 : 28,718,420.64 = 13,072,461.50 : x
  2. Step 2: Convert to fraction form
    20,812,932.47/28,718,420.64 = 13,072,461.50/x
  3. Step 3: Cross multiply
    20,812,932.47x = 28,718,420.64 × 13,072,461.50
  4. Step 4: Simplify right side
    20,812,932.47x = 375,420,448,013,613.25
  5. Step 5: Solve for x
    x = 375,420,448,013,613.25/20,812,932.47
  6. Step 6: Final answer
    x = 18,037,844.91

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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.