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Finding the Fourth Proportional to 18,420.88, 25,420.02 and 10,463.08

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Solution

The fourth proportional to 18,420.88, 25,420.02 and 10,463.08 is: 14,438.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.88 : 25,420.02 = 10,463.08 : x
  2. Step 2: Convert to fraction form
    18,420.88/25,420.02 = 10,463.08/x
  3. Step 3: Cross multiply
    18,420.88x = 25,420.02 × 10,463.08
  4. Step 4: Simplify right side
    18,420.88x = 265,971,702.86
  5. Step 5: Solve for x
    x = 265,971,702.86/18,420.88
  6. Step 6: Final answer
    x = 14,438.60

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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.