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Finding the Fourth Proportional to 15,927.22, 21,980.02 and 9,212.20

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Solution

The fourth proportional to 15,927.22, 21,980.02 and 9,212.20 is: 12,713.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,927.22 : 21,980.02 = 9,212.20 : x
  2. Step 2: Convert to fraction form
    15,927.22/21,980.02 = 9,212.20/x
  3. Step 3: Cross multiply
    15,927.22x = 21,980.02 × 9,212.20
  4. Step 4: Simplify right side
    15,927.22x = 202,484,340.24
  5. Step 5: Solve for x
    x = 202,484,340.24/15,927.22
  6. Step 6: Final answer
    x = 12,713.10

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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.