Home / 28,856.60-43,328.10-20,130.20

Finding the Fourth Proportional to 28,856.60, 43,328.10 and 20,130.20

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Solution

The fourth proportional to 28,856.60, 43,328.10 and 20,130.20 is: 30,225.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,856.60 : 43,328.10 = 20,130.20 : x
  2. Step 2: Convert to fraction form
    28,856.60/43,328.10 = 20,130.20/x
  3. Step 3: Cross multiply
    28,856.60x = 43,328.10 × 20,130.20
  4. Step 4: Simplify right side
    28,856.60x = 872,203,318.62
  5. Step 5: Solve for x
    x = 872,203,318.62/28,856.60
  6. Step 6: Final answer
    x = 30,225.44

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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.