Home / 28,121.60-42,182.40-7,345.04

Finding the Fourth Proportional to 28,121.60, 42,182.40 and 7,345.04

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Solution

The fourth proportional to 28,121.60, 42,182.40 and 7,345.04 is: 11,017.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.60 : 42,182.40 = 7,345.04 : x
  2. Step 2: Convert to fraction form
    28,121.60/42,182.40 = 7,345.04/x
  3. Step 3: Cross multiply
    28,121.60x = 42,182.40 × 7,345.04
  4. Step 4: Simplify right side
    28,121.60x = 309,831,415.30
  5. Step 5: Solve for x
    x = 309,831,415.30/28,121.60
  6. Step 6: Final answer
    x = 11,017.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.