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Finding the Fourth Proportional to 25,531.40, 38,300.70 and 7,999.40

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Solution

The fourth proportional to 25,531.40, 38,300.70 and 7,999.40 is: 12,000.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,531.40 : 38,300.70 = 7,999.40 : x
  2. Step 2: Convert to fraction form
    25,531.40/38,300.70 = 7,999.40/x
  3. Step 3: Cross multiply
    25,531.40x = 38,300.70 × 7,999.40
  4. Step 4: Simplify right side
    25,531.40x = 306,382,619.58
  5. Step 5: Solve for x
    x = 306,382,619.58/25,531.40
  6. Step 6: Final answer
    x = 12,000.23

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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.