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Finding the Fourth Proportional to 18,335.76, 25,258 and 15,638.16

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Solution

The fourth proportional to 18,335.76, 25,258 and 15,638.16 is: 21,541.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,335.76 : 25,258 = 15,638.16 : x
  2. Step 2: Convert to fraction form
    18,335.76/25,258 = 15,638.16/x
  3. Step 3: Cross multiply
    18,335.76x = 25,258 × 15,638.16
  4. Step 4: Simplify right side
    18,335.76x = 394,988,645.28
  5. Step 5: Solve for x
    x = 394,988,645.28/18,335.76
  6. Step 6: Final answer
    x = 21,541.98

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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.