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Finding the Fourth Proportional to 20,652.67, 28,488 and 18,006.40

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Solution

The fourth proportional to 20,652.67, 28,488 and 18,006.40 is: 24,837.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.67 : 28,488 = 18,006.40 : x
  2. Step 2: Convert to fraction form
    20,652.67/28,488 = 18,006.40/x
  3. Step 3: Cross multiply
    20,652.67x = 28,488 × 18,006.40
  4. Step 4: Simplify right side
    20,652.67x = 512,966,323.20
  5. Step 5: Solve for x
    x = 512,966,323.20/20,652.67
  6. Step 6: Final answer
    x = 24,837.77

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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.