Home / 25,428.96-35,063.28-20,815.20

Finding the Fourth Proportional to 25,428.96, 35,063.28 and 20,815.20

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Solution

The fourth proportional to 25,428.96, 35,063.28 and 20,815.20 is: 28,701.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,428.96 : 35,063.28 = 20,815.20 : x
  2. Step 2: Convert to fraction form
    25,428.96/35,063.28 = 20,815.20/x
  3. Step 3: Cross multiply
    25,428.96x = 35,063.28 × 20,815.20
  4. Step 4: Simplify right side
    25,428.96x = 729,849,185.86
  5. Step 5: Solve for x
    x = 729,849,185.86/25,428.96
  6. Step 6: Final answer
    x = 28,701.50

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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.