Home / 22,219.76-30,621.04-15,921.20

Finding the Fourth Proportional to 22,219.76, 30,621.04 and 15,921.20

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Solution

The fourth proportional to 22,219.76, 30,621.04 and 15,921.20 is: 21,941.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,219.76 : 30,621.04 = 15,921.20 : x
  2. Step 2: Convert to fraction form
    22,219.76/30,621.04 = 15,921.20/x
  3. Step 3: Cross multiply
    22,219.76x = 30,621.04 × 15,921.20
  4. Step 4: Simplify right side
    22,219.76x = 487,523,702.05
  5. Step 5: Solve for x
    x = 487,523,702.05/22,219.76
  6. Step 6: Final answer
    x = 21,941.00

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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.