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Finding the Fourth Proportional to 18,498.88, 25,529.88 and 15,311.26

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Solution

The fourth proportional to 18,498.88, 25,529.88 and 15,311.26 is: 21,130.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,498.88 : 25,529.88 = 15,311.26 : x
  2. Step 2: Convert to fraction form
    18,498.88/25,529.88 = 15,311.26/x
  3. Step 3: Cross multiply
    18,498.88x = 25,529.88 × 15,311.26
  4. Step 4: Simplify right side
    18,498.88x = 390,894,630.45
  5. Step 5: Solve for x
    x = 390,894,630.45/18,498.88
  6. Step 6: Final answer
    x = 21,130.72

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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.