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Finding the Fourth Proportional to 17,145.60, 25,718.40 and 14,521.20

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Solution

The fourth proportional to 17,145.60, 25,718.40 and 14,521.20 is: 21,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,145.60 : 25,718.40 = 14,521.20 : x
  2. Step 2: Convert to fraction form
    17,145.60/25,718.40 = 14,521.20/x
  3. Step 3: Cross multiply
    17,145.60x = 25,718.40 × 14,521.20
  4. Step 4: Simplify right side
    17,145.60x = 373,462,030.08
  5. Step 5: Solve for x
    x = 373,462,030.08/17,145.60
  6. Step 6: Final answer
    x = 21,781.80

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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.