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Finding the Fourth Proportional to 15,499, 21,444.92 and 13,513.69

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Solution

The fourth proportional to 15,499, 21,444.92 and 13,513.69 is: 18,697.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,499 : 21,444.92 = 13,513.69 : x
  2. Step 2: Convert to fraction form
    15,499/21,444.92 = 13,513.69/x
  3. Step 3: Cross multiply
    15,499x = 21,444.92 × 13,513.69
  4. Step 4: Simplify right side
    15,499x = 289,800,000.95
  5. Step 5: Solve for x
    x = 289,800,000.95/15,499
  6. Step 6: Final answer
    x = 18,697.98

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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.