Home / 15,449.78-21,312.82-9,774.97

Finding the Fourth Proportional to 15,449.78, 21,312.82 and 9,774.97

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Solution

The fourth proportional to 15,449.78, 21,312.82 and 9,774.97 is: 13,484.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,449.78 : 21,312.82 = 9,774.97 : x
  2. Step 2: Convert to fraction form
    15,449.78/21,312.82 = 9,774.97/x
  3. Step 3: Cross multiply
    15,449.78x = 21,312.82 × 9,774.97
  4. Step 4: Simplify right side
    15,449.78x = 208,332,176.12
  5. Step 5: Solve for x
    x = 208,332,176.12/15,449.78
  6. Step 6: Final answer
    x = 13,484.48

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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.