Home / 15,861.18-21,888.72-9,577.20

Finding the Fourth Proportional to 15,861.18, 21,888.72 and 9,577.20

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Solution

The fourth proportional to 15,861.18, 21,888.72 and 9,577.20 is: 13,216.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,861.18 : 21,888.72 = 9,577.20 : x
  2. Step 2: Convert to fraction form
    15,861.18/21,888.72 = 9,577.20/x
  3. Step 3: Cross multiply
    15,861.18x = 21,888.72 × 9,577.20
  4. Step 4: Simplify right side
    15,861.18x = 209,632,649.18
  5. Step 5: Solve for x
    x = 209,632,649.18/15,861.18
  6. Step 6: Final answer
    x = 13,216.71

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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.