Home / 15,085.20-20,816.28-8,797.98

Finding the Fourth Proportional to 15,085.20, 20,816.28 and 8,797.98

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Solution

The fourth proportional to 15,085.20, 20,816.28 and 8,797.98 is: 12,140.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.20 : 20,816.28 = 8,797.98 : x
  2. Step 2: Convert to fraction form
    15,085.20/20,816.28 = 8,797.98/x
  3. Step 3: Cross multiply
    15,085.20x = 20,816.28 × 8,797.98
  4. Step 4: Simplify right side
    15,085.20x = 183,141,215.11
  5. Step 5: Solve for x
    x = 183,141,215.11/15,085.20
  6. Step 6: Final answer
    x = 12,140.46

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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.