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Finding the Fourth Proportional to 18,428.63, 25,431.71 and 10,045.13

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Solution

The fourth proportional to 18,428.63, 25,431.71 and 10,045.13 is: 13,862.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.63 : 25,431.71 = 10,045.13 : x
  2. Step 2: Convert to fraction form
    18,428.63/25,431.71 = 10,045.13/x
  3. Step 3: Cross multiply
    18,428.63x = 25,431.71 × 10,045.13
  4. Step 4: Simplify right side
    18,428.63x = 255,464,655.69
  5. Step 5: Solve for x
    x = 255,464,655.69/18,428.63
  6. Step 6: Final answer
    x = 13,862.38

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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.