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Finding the Fourth Proportional to 28,219.72, 42,332.24 and 7,956.40

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Solution

The fourth proportional to 28,219.72, 42,332.24 and 7,956.40 is: 11,935.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.72 : 42,332.24 = 7,956.40 : x
  2. Step 2: Convert to fraction form
    28,219.72/42,332.24 = 7,956.40/x
  3. Step 3: Cross multiply
    28,219.72x = 42,332.24 × 7,956.40
  4. Step 4: Simplify right side
    28,219.72x = 336,812,234.34
  5. Step 5: Solve for x
    x = 336,812,234.34/28,219.72
  6. Step 6: Final answer
    x = 11,935.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.