Home / 20,760.86-28,681.20-13,607.76

Finding the Fourth Proportional to 20,760.86, 28,681.20 and 13,607.76

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Solution

The fourth proportional to 20,760.86, 28,681.20 and 13,607.76 is: 18,799.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.86 : 28,681.20 = 13,607.76 : x
  2. Step 2: Convert to fraction form
    20,760.86/28,681.20 = 13,607.76/x
  3. Step 3: Cross multiply
    20,760.86x = 28,681.20 × 13,607.76
  4. Step 4: Simplify right side
    20,760.86x = 390,286,886.11
  5. Step 5: Solve for x
    x = 390,286,886.11/20,760.86
  6. Step 6: Final answer
    x = 18,799.17

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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.