Home / 30,545.15-42,154-17,120.72

Finding the Fourth Proportional to 30,545.15, 42,154 and 17,120.72

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Solution

The fourth proportional to 30,545.15, 42,154 and 17,120.72 is: 23,627.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,545.15 : 42,154 = 17,120.72 : x
  2. Step 2: Convert to fraction form
    30,545.15/42,154 = 17,120.72/x
  3. Step 3: Cross multiply
    30,545.15x = 42,154 × 17,120.72
  4. Step 4: Simplify right side
    30,545.15x = 721,706,830.88
  5. Step 5: Solve for x
    x = 721,706,830.88/30,545.15
  6. Step 6: Final answer
    x = 23,627.54

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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.