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Finding the Fourth Proportional to 18,739.71, 25,875.71 and 11,580.03

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Solution

The fourth proportional to 18,739.71, 25,875.71 and 11,580.03 is: 15,989.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.71 : 25,875.71 = 11,580.03 : x
  2. Step 2: Convert to fraction form
    18,739.71/25,875.71 = 11,580.03/x
  3. Step 3: Cross multiply
    18,739.71x = 25,875.71 × 11,580.03
  4. Step 4: Simplify right side
    18,739.71x = 299,641,440.17
  5. Step 5: Solve for x
    x = 299,641,440.17/18,739.71
  6. Step 6: Final answer
    x = 15,989.65

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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.