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Finding the Fourth Proportional to 25,643.40, 38,470.20 and 10,852.20

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Solution

The fourth proportional to 25,643.40, 38,470.20 and 10,852.20 is: 16,280.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,643.40 : 38,470.20 = 10,852.20 : x
  2. Step 2: Convert to fraction form
    25,643.40/38,470.20 = 10,852.20/x
  3. Step 3: Cross multiply
    25,643.40x = 38,470.20 × 10,852.20
  4. Step 4: Simplify right side
    25,643.40x = 417,486,304.44
  5. Step 5: Solve for x
    x = 417,486,304.44/25,643.40
  6. Step 6: Final answer
    x = 16,280.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.