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Finding the Fourth Proportional to 25,708.72, 38,559.09 and 9,921.16

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Solution

The fourth proportional to 25,708.72, 38,559.09 and 9,921.16 is: 14,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,708.72 : 38,559.09 = 9,921.16 : x
  2. Step 2: Convert to fraction form
    25,708.72/38,559.09 = 9,921.16/x
  3. Step 3: Cross multiply
    25,708.72x = 38,559.09 × 9,921.16
  4. Step 4: Simplify right side
    25,708.72x = 382,550,822.49
  5. Step 5: Solve for x
    x = 382,550,822.49/25,708.72
  6. Step 6: Final answer
    x = 14,880.20

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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.