Home / 25,696.80-35,420.56-20,972.96

Finding the Fourth Proportional to 25,696.80, 35,420.56 and 20,972.96

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Solution

The fourth proportional to 25,696.80, 35,420.56 and 20,972.96 is: 28,909.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,696.80 : 35,420.56 = 20,972.96 : x
  2. Step 2: Convert to fraction form
    25,696.80/35,420.56 = 20,972.96/x
  3. Step 3: Cross multiply
    25,696.80x = 35,420.56 × 20,972.96
  4. Step 4: Simplify right side
    25,696.80x = 742,873,988.06
  5. Step 5: Solve for x
    x = 742,873,988.06/25,696.80
  6. Step 6: Final answer
    x = 28,909.20

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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.