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Finding the Fourth Proportional to 18,637.01, 25,719.55 and 10,139.60

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Solution

The fourth proportional to 18,637.01, 25,719.55 and 10,139.60 is: 13,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637.01 : 25,719.55 = 10,139.60 : x
  2. Step 2: Convert to fraction form
    18,637.01/25,719.55 = 10,139.60/x
  3. Step 3: Cross multiply
    18,637.01x = 25,719.55 × 10,139.60
  4. Step 4: Simplify right side
    18,637.01x = 260,785,834.18
  5. Step 5: Solve for x
    x = 260,785,834.18/18,637.01
  6. Step 6: Final answer
    x = 13,992.90

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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.