Home / 18,721,905.10-28,082,857.65-9,143,428.30

Finding the Fourth Proportional to 18,721,905.10, 28,082,857.65 and 9,143,428.30

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Solution

The fourth proportional to 18,721,905.10, 28,082,857.65 and 9,143,428.30 is: 13,715,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,905.10 : 28,082,857.65 = 9,143,428.30 : x
  2. Step 2: Convert to fraction form
    18,721,905.10/28,082,857.65 = 9,143,428.30/x
  3. Step 3: Cross multiply
    18,721,905.10x = 28,082,857.65 × 9,143,428.30
  4. Step 4: Simplify right side
    18,721,905.10x = 256,773,595,381,881.50
  5. Step 5: Solve for x
    x = 256,773,595,381,881.50/18,721,905.10
  6. Step 6: Final answer
    x = 13,715,142.45

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Similar ratio
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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.