Home / 28,438.92-42,663.78-12,856.50

Finding the Fourth Proportional to 28,438.92, 42,663.78 and 12,856.50

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Solution

The fourth proportional to 28,438.92, 42,663.78 and 12,856.50 is: 19,287.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.92 : 42,663.78 = 12,856.50 : x
  2. Step 2: Convert to fraction form
    28,438.92/42,663.78 = 12,856.50/x
  3. Step 3: Cross multiply
    28,438.92x = 42,663.78 × 12,856.50
  4. Step 4: Simplify right side
    28,438.92x = 548,506,887.57
  5. Step 5: Solve for x
    x = 548,506,887.57/28,438.92
  6. Step 6: Final answer
    x = 19,287.19

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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.