Home / 28,856.80-43,280.70-9,140.20

Finding the Fourth Proportional to 28,856.80, 43,280.70 and 9,140.20

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Solution

The fourth proportional to 28,856.80, 43,280.70 and 9,140.20 is: 13,708.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,856.80 : 43,280.70 = 9,140.20 : x
  2. Step 2: Convert to fraction form
    28,856.80/43,280.70 = 9,140.20/x
  3. Step 3: Cross multiply
    28,856.80x = 43,280.70 × 9,140.20
  4. Step 4: Simplify right side
    28,856.80x = 395,594,254.14
  5. Step 5: Solve for x
    x = 395,594,254.14/28,856.80
  6. Step 6: Final answer
    x = 13,708.87

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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.