Home / 28,454.48-39,263.56-15,879.76

Finding the Fourth Proportional to 28,454.48, 39,263.56 and 15,879.76

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Solution

The fourth proportional to 28,454.48, 39,263.56 and 15,879.76 is: 21,912.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.48 : 39,263.56 = 15,879.76 : x
  2. Step 2: Convert to fraction form
    28,454.48/39,263.56 = 15,879.76/x
  3. Step 3: Cross multiply
    28,454.48x = 39,263.56 × 15,879.76
  4. Step 4: Simplify right side
    28,454.48x = 623,495,909.55
  5. Step 5: Solve for x
    x = 623,495,909.55/28,454.48
  6. Step 6: Final answer
    x = 21,912.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.