Home / 15,500.95-21,390-9,836.62

Finding the Fourth Proportional to 15,500.95, 21,390 and 9,836.62

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Solution

The fourth proportional to 15,500.95, 21,390 and 9,836.62 is: 13,573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.95 : 21,390 = 9,836.62 : x
  2. Step 2: Convert to fraction form
    15,500.95/21,390 = 9,836.62/x
  3. Step 3: Cross multiply
    15,500.95x = 21,390 × 9,836.62
  4. Step 4: Simplify right side
    15,500.95x = 210,405,301.80
  5. Step 5: Solve for x
    x = 210,405,301.80/15,500.95
  6. Step 6: Final answer
    x = 13,573.70

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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.