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Finding the Fourth Proportional to 30,417.64, 41,972.19 and 16,987.18

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Solution

The fourth proportional to 30,417.64, 41,972.19 and 16,987.18 is: 23,439.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,417.64 : 41,972.19 = 16,987.18 : x
  2. Step 2: Convert to fraction form
    30,417.64/41,972.19 = 16,987.18/x
  3. Step 3: Cross multiply
    30,417.64x = 41,972.19 × 16,987.18
  4. Step 4: Simplify right side
    30,417.64x = 712,989,146.52
  5. Step 5: Solve for x
    x = 712,989,146.52/30,417.64
  6. Step 6: Final answer
    x = 23,439.99

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.