Home / 20,717.67-28,602.19-13,656.40

Finding the Fourth Proportional to 20,717.67, 28,602.19 and 13,656.40

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Solution

The fourth proportional to 20,717.67, 28,602.19 and 13,656.40 is: 18,853.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.67 : 28,602.19 = 13,656.40 : x
  2. Step 2: Convert to fraction form
    20,717.67/28,602.19 = 13,656.40/x
  3. Step 3: Cross multiply
    20,717.67x = 28,602.19 × 13,656.40
  4. Step 4: Simplify right side
    20,717.67x = 390,602,854.67
  5. Step 5: Solve for x
    x = 390,602,854.67/20,717.67
  6. Step 6: Final answer
    x = 18,853.61

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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.