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Finding the Fourth Proportional to 21,718.52, 32,740.52 and 20,271.85

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Solution

The fourth proportional to 21,718.52, 32,740.52 and 20,271.85 is: 30,559.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.52 : 32,740.52 = 20,271.85 : x
  2. Step 2: Convert to fraction form
    21,718.52/32,740.52 = 20,271.85/x
  3. Step 3: Cross multiply
    21,718.52x = 32,740.52 × 20,271.85
  4. Step 4: Simplify right side
    21,718.52x = 663,710,879.19
  5. Step 5: Solve for x
    x = 663,710,879.19/21,718.52
  6. Step 6: Final answer
    x = 30,559.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.