Home / 15,621.99-21,565.46-9,964.50

Finding the Fourth Proportional to 15,621.99, 21,565.46 and 9,964.50

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Solution

The fourth proportional to 15,621.99, 21,565.46 and 9,964.50 is: 13,755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.99 : 21,565.46 = 9,964.50 : x
  2. Step 2: Convert to fraction form
    15,621.99/21,565.46 = 9,964.50/x
  3. Step 3: Cross multiply
    15,621.99x = 21,565.46 × 9,964.50
  4. Step 4: Simplify right side
    15,621.99x = 214,889,026.17
  5. Step 5: Solve for x
    x = 214,889,026.17/15,621.99
  6. Step 6: Final answer
    x = 13,755.55

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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.