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Finding the Fourth Proportional to 18,885,218.10, 28,327,827.15 and 13,145,655.30

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Solution

The fourth proportional to 18,885,218.10, 28,327,827.15 and 13,145,655.30 is: 19,718,482.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885,218.10 : 28,327,827.15 = 13,145,655.30 : x
  2. Step 2: Convert to fraction form
    18,885,218.10/28,327,827.15 = 13,145,655.30/x
  3. Step 3: Cross multiply
    18,885,218.10x = 28,327,827.15 × 13,145,655.30
  4. Step 4: Simplify right side
    18,885,218.10x = 372,387,851,111,881.38
  5. Step 5: Solve for x
    x = 372,387,851,111,881.38/18,885,218.10
  6. Step 6: Final answer
    x = 19,718,482.95

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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.