Home / 15,660.34-21,598.72-13,767.92

Finding the Fourth Proportional to 15,660.34, 21,598.72 and 13,767.92

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Solution

The fourth proportional to 15,660.34, 21,598.72 and 13,767.92 is: 18,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.34 : 21,598.72 = 13,767.92 : x
  2. Step 2: Convert to fraction form
    15,660.34/21,598.72 = 13,767.92/x
  3. Step 3: Cross multiply
    15,660.34x = 21,598.72 × 13,767.92
  4. Step 4: Simplify right side
    15,660.34x = 297,369,449.06
  5. Step 5: Solve for x
    x = 297,369,449.06/15,660.34
  6. Step 6: Final answer
    x = 18,988.70

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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.