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Finding the Fourth Proportional to 18,406.40, 25,435.28 and 15,047.93

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Solution

The fourth proportional to 18,406.40, 25,435.28 and 15,047.93 is: 20,794.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,406.40 : 25,435.28 = 15,047.93 : x
  2. Step 2: Convert to fraction form
    18,406.40/25,435.28 = 15,047.93/x
  3. Step 3: Cross multiply
    18,406.40x = 25,435.28 × 15,047.93
  4. Step 4: Simplify right side
    18,406.40x = 382,748,414.18
  5. Step 5: Solve for x
    x = 382,748,414.18/18,406.40
  6. Step 6: Final answer
    x = 20,794.32

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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.