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Finding the Fourth Proportional to 17,987.65, 26,981.48 and 9,671.58

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Solution

The fourth proportional to 17,987.65, 26,981.48 and 9,671.58 is: 14,507.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,987.65 : 26,981.48 = 9,671.58 : x
  2. Step 2: Convert to fraction form
    17,987.65/26,981.48 = 9,671.58/x
  3. Step 3: Cross multiply
    17,987.65x = 26,981.48 × 9,671.58
  4. Step 4: Simplify right side
    17,987.65x = 260,953,542.34
  5. Step 5: Solve for x
    x = 260,953,542.34/17,987.65
  6. Step 6: Final answer
    x = 14,507.37

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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.