Home / 15,478.88-21,353.28-9,186.80

Finding the Fourth Proportional to 15,478.88, 21,353.28 and 9,186.80

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Solution

The fourth proportional to 15,478.88, 21,353.28 and 9,186.80 is: 12,673.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.88 : 21,353.28 = 9,186.80 : x
  2. Step 2: Convert to fraction form
    15,478.88/21,353.28 = 9,186.80/x
  3. Step 3: Cross multiply
    15,478.88x = 21,353.28 × 9,186.80
  4. Step 4: Simplify right side
    15,478.88x = 196,168,312.70
  5. Step 5: Solve for x
    x = 196,168,312.70/15,478.88
  6. Step 6: Final answer
    x = 12,673.29

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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.