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Finding the Fourth Proportional to 21,306.80, 32,017.80 and 18,772.40

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Solution

The fourth proportional to 21,306.80, 32,017.80 and 18,772.40 is: 28,209.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.80 : 32,017.80 = 18,772.40 : x
  2. Step 2: Convert to fraction form
    21,306.80/32,017.80 = 18,772.40/x
  3. Step 3: Cross multiply
    21,306.80x = 32,017.80 × 18,772.40
  4. Step 4: Simplify right side
    21,306.80x = 601,050,948.72
  5. Step 5: Solve for x
    x = 601,050,948.72/21,306.80
  6. Step 6: Final answer
    x = 28,209.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.