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Finding the Fourth Proportional to 17,987.31, 26,988.77 and 9,657.60

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Solution

The fourth proportional to 17,987.31, 26,988.77 and 9,657.60 is: 14,490.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,987.31 : 26,988.77 = 9,657.60 : x
  2. Step 2: Convert to fraction form
    17,987.31/26,988.77 = 9,657.60/x
  3. Step 3: Cross multiply
    17,987.31x = 26,988.77 × 9,657.60
  4. Step 4: Simplify right side
    17,987.31x = 260,646,696.86
  5. Step 5: Solve for x
    x = 260,646,696.86/17,987.31
  6. Step 6: Final answer
    x = 14,490.59

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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.