Home / 15,549.77-21,471.34-12,678.97

Finding the Fourth Proportional to 15,549.77, 21,471.34 and 12,678.97

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Solution

The fourth proportional to 15,549.77, 21,471.34 and 12,678.97 is: 17,507.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,549.77 : 21,471.34 = 12,678.97 : x
  2. Step 2: Convert to fraction form
    15,549.77/21,471.34 = 12,678.97/x
  3. Step 3: Cross multiply
    15,549.77x = 21,471.34 × 12,678.97
  4. Step 4: Simplify right side
    15,549.77x = 272,234,475.72
  5. Step 5: Solve for x
    x = 272,234,475.72/15,549.77
  6. Step 6: Final answer
    x = 17,507.30

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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.