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Finding the Fourth Proportional to 18,937.45, 26,133.89 and 10,439.89

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Solution

The fourth proportional to 18,937.45, 26,133.89 and 10,439.89 is: 14,407.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.45 : 26,133.89 = 10,439.89 : x
  2. Step 2: Convert to fraction form
    18,937.45/26,133.89 = 10,439.89/x
  3. Step 3: Cross multiply
    18,937.45x = 26,133.89 × 10,439.89
  4. Step 4: Simplify right side
    18,937.45x = 272,834,878.06
  5. Step 5: Solve for x
    x = 272,834,878.06/18,937.45
  6. Step 6: Final answer
    x = 14,407.16

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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.