Home / 28,203.60-42,302.20-7,428.72

Finding the Fourth Proportional to 28,203.60, 42,302.20 and 7,428.72

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Solution

The fourth proportional to 28,203.60, 42,302.20 and 7,428.72 is: 11,142.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.60 : 42,302.20 = 7,428.72 : x
  2. Step 2: Convert to fraction form
    28,203.60/42,302.20 = 7,428.72/x
  3. Step 3: Cross multiply
    28,203.60x = 42,302.20 × 7,428.72
  4. Step 4: Simplify right side
    28,203.60x = 314,251,199.18
  5. Step 5: Solve for x
    x = 314,251,199.18/28,203.60
  6. Step 6: Final answer
    x = 11,142.24

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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.