Home / 15,519.60-21,415.86-8,445.87

Finding the Fourth Proportional to 15,519.60, 21,415.86 and 8,445.87

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Solution

The fourth proportional to 15,519.60, 21,415.86 and 8,445.87 is: 11,654.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519.60 : 21,415.86 = 8,445.87 : x
  2. Step 2: Convert to fraction form
    15,519.60/21,415.86 = 8,445.87/x
  3. Step 3: Cross multiply
    15,519.60x = 21,415.86 × 8,445.87
  4. Step 4: Simplify right side
    15,519.60x = 180,875,569.50
  5. Step 5: Solve for x
    x = 180,875,569.50/15,519.60
  6. Step 6: Final answer
    x = 11,654.65

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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.