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Finding the Fourth Proportional to 15,781.60, 23,666.80 and 7,000.80

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Solution

The fourth proportional to 15,781.60, 23,666.80 and 7,000.80 is: 10,498.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.60 : 23,666.80 = 7,000.80 : x
  2. Step 2: Convert to fraction form
    15,781.60/23,666.80 = 7,000.80/x
  3. Step 3: Cross multiply
    15,781.60x = 23,666.80 × 7,000.80
  4. Step 4: Simplify right side
    15,781.60x = 165,686,533.44
  5. Step 5: Solve for x
    x = 165,686,533.44/15,781.60
  6. Step 6: Final answer
    x = 10,498.72

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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.