Home / 20,689.18-28,546.71-13,529.59

Finding the Fourth Proportional to 20,689.18, 28,546.71 and 13,529.59

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Solution

The fourth proportional to 20,689.18, 28,546.71 and 13,529.59 is: 18,667.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.18 : 28,546.71 = 13,529.59 : x
  2. Step 2: Convert to fraction form
    20,689.18/28,546.71 = 13,529.59/x
  3. Step 3: Cross multiply
    20,689.18x = 28,546.71 × 13,529.59
  4. Step 4: Simplify right side
    20,689.18x = 386,225,139.42
  5. Step 5: Solve for x
    x = 386,225,139.42/20,689.18
  6. Step 6: Final answer
    x = 18,667.98

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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.