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Finding the Fourth Proportional to 15,154.18, 20,907.11 and 15,130.82

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Solution

The fourth proportional to 15,154.18, 20,907.11 and 15,130.82 is: 20,874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.18 : 20,907.11 = 15,130.82 : x
  2. Step 2: Convert to fraction form
    15,154.18/20,907.11 = 15,130.82/x
  3. Step 3: Cross multiply
    15,154.18x = 20,907.11 × 15,130.82
  4. Step 4: Simplify right side
    15,154.18x = 316,341,718.13
  5. Step 5: Solve for x
    x = 316,341,718.13/15,154.18
  6. Step 6: Final answer
    x = 20,874.88

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1.5x scale

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.