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Finding the Fourth Proportional to 21,870.72, 32,805.72 and 6,288.30

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Solution

The fourth proportional to 21,870.72, 32,805.72 and 6,288.30 is: 9,432.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.72 : 32,805.72 = 6,288.30 : x
  2. Step 2: Convert to fraction form
    21,870.72/32,805.72 = 6,288.30/x
  3. Step 3: Cross multiply
    21,870.72x = 32,805.72 × 6,288.30
  4. Step 4: Simplify right side
    21,870.72x = 206,292,209.08
  5. Step 5: Solve for x
    x = 206,292,209.08/21,870.72
  6. Step 6: Final answer
    x = 9,432.35

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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.