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Finding the Fourth Proportional to 25,407.68, 35,071.80 and 20,683.76

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Solution

The fourth proportional to 25,407.68, 35,071.80 and 20,683.76 is: 28,551.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,407.68 : 35,071.80 = 20,683.76 : x
  2. Step 2: Convert to fraction form
    25,407.68/35,071.80 = 20,683.76/x
  3. Step 3: Cross multiply
    25,407.68x = 35,071.80 × 20,683.76
  4. Step 4: Simplify right side
    25,407.68x = 725,416,693.97
  5. Step 5: Solve for x
    x = 725,416,693.97/25,407.68
  6. Step 6: Final answer
    x = 28,551.08

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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.