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Finding the Fourth Proportional to 15,955.95, 22,018.35 and 8,784.47

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Solution

The fourth proportional to 15,955.95, 22,018.35 and 8,784.47 is: 12,122.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,955.95 : 22,018.35 = 8,784.47 : x
  2. Step 2: Convert to fraction form
    15,955.95/22,018.35 = 8,784.47/x
  3. Step 3: Cross multiply
    15,955.95x = 22,018.35 × 8,784.47
  4. Step 4: Simplify right side
    15,955.95x = 193,419,623.01
  5. Step 5: Solve for x
    x = 193,419,623.01/15,955.95
  6. Step 6: Final answer
    x = 12,122.10

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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.