Home / 28,507.52-42,761.28-12,921.50

Finding the Fourth Proportional to 28,507.52, 42,761.28 and 12,921.50

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Solution

The fourth proportional to 28,507.52, 42,761.28 and 12,921.50 is: 19,382.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.52 : 42,761.28 = 12,921.50 : x
  2. Step 2: Convert to fraction form
    28,507.52/42,761.28 = 12,921.50/x
  3. Step 3: Cross multiply
    28,507.52x = 42,761.28 × 12,921.50
  4. Step 4: Simplify right side
    28,507.52x = 552,539,879.52
  5. Step 5: Solve for x
    x = 552,539,879.52/28,507.52
  6. Step 6: Final answer
    x = 19,382.25

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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.