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Finding the Fourth Proportional to 18,925.64, 26,121.88 and 10,972.24

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Solution

The fourth proportional to 18,925.64, 26,121.88 and 10,972.24 is: 15,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,925.64 : 26,121.88 = 10,972.24 : x
  2. Step 2: Convert to fraction form
    18,925.64/26,121.88 = 10,972.24/x
  3. Step 3: Cross multiply
    18,925.64x = 26,121.88 × 10,972.24
  4. Step 4: Simplify right side
    18,925.64x = 286,615,536.61
  5. Step 5: Solve for x
    x = 286,615,536.61/18,925.64
  6. Step 6: Final answer
    x = 15,144.30

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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.