Home / 28,442.40-42,686.84-20,130.48

Finding the Fourth Proportional to 28,442.40, 42,686.84 and 20,130.48

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Solution

The fourth proportional to 28,442.40, 42,686.84 and 20,130.48 is: 30,212.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.40 : 42,686.84 = 20,130.48 : x
  2. Step 2: Convert to fraction form
    28,442.40/42,686.84 = 20,130.48/x
  3. Step 3: Cross multiply
    28,442.40x = 42,686.84 × 20,130.48
  4. Step 4: Simplify right side
    28,442.40x = 859,306,578.88
  5. Step 5: Solve for x
    x = 859,306,578.88/28,442.40
  6. Step 6: Final answer
    x = 30,212.17

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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.