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Finding the Fourth Proportional to 19,800.72, 29,703.78 and 7,319.16

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Solution

The fourth proportional to 19,800.72, 29,703.78 and 7,319.16 is: 10,979.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,800.72 : 29,703.78 = 7,319.16 : x
  2. Step 2: Convert to fraction form
    19,800.72/29,703.78 = 7,319.16/x
  3. Step 3: Cross multiply
    19,800.72x = 29,703.78 × 7,319.16
  4. Step 4: Simplify right side
    19,800.72x = 217,406,718.42
  5. Step 5: Solve for x
    x = 217,406,718.42/19,800.72
  6. Step 6: Final answer
    x = 10,979.74

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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.