Home / 15,520.24-21,420.14-8,807.52

Finding the Fourth Proportional to 15,520.24, 21,420.14 and 8,807.52

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Solution

The fourth proportional to 15,520.24, 21,420.14 and 8,807.52 is: 12,155.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.24 : 21,420.14 = 8,807.52 : x
  2. Step 2: Convert to fraction form
    15,520.24/21,420.14 = 8,807.52/x
  3. Step 3: Cross multiply
    15,520.24x = 21,420.14 × 8,807.52
  4. Step 4: Simplify right side
    15,520.24x = 188,658,311.45
  5. Step 5: Solve for x
    x = 188,658,311.45/15,520.24
  6. Step 6: Final answer
    x = 12,155.63

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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.