Home / 15,820.56-21,807.24-12,458.04

Finding the Fourth Proportional to 15,820.56, 21,807.24 and 12,458.04

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Solution

The fourth proportional to 15,820.56, 21,807.24 and 12,458.04 is: 17,172.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.56 : 21,807.24 = 12,458.04 : x
  2. Step 2: Convert to fraction form
    15,820.56/21,807.24 = 12,458.04/x
  3. Step 3: Cross multiply
    15,820.56x = 21,807.24 × 12,458.04
  4. Step 4: Simplify right side
    15,820.56x = 271,675,468.21
  5. Step 5: Solve for x
    x = 271,675,468.21/15,820.56
  6. Step 6: Final answer
    x = 17,172.30

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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.