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Finding the Fourth Proportional to 28,497.60, 42,746.40 and 16,687.80

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Solution

The fourth proportional to 28,497.60, 42,746.40 and 16,687.80 is: 25,031.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.60 : 42,746.40 = 16,687.80 : x
  2. Step 2: Convert to fraction form
    28,497.60/42,746.40 = 16,687.80/x
  3. Step 3: Cross multiply
    28,497.60x = 42,746.40 × 16,687.80
  4. Step 4: Simplify right side
    28,497.60x = 713,343,373.92
  5. Step 5: Solve for x
    x = 713,343,373.92/28,497.60
  6. Step 6: Final answer
    x = 25,031.70

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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.