Home / 13,479.40-18,565.86-13,398.76

Finding the Fourth Proportional to 13,479.40, 18,565.86 and 13,398.76

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Solution

The fourth proportional to 13,479.40, 18,565.86 and 13,398.76 is: 18,454.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.40 : 18,565.86 = 13,398.76 : x
  2. Step 2: Convert to fraction form
    13,479.40/18,565.86 = 13,398.76/x
  3. Step 3: Cross multiply
    13,479.40x = 18,565.86 × 13,398.76
  4. Step 4: Simplify right side
    13,479.40x = 248,759,502.33
  5. Step 5: Solve for x
    x = 248,759,502.33/13,479.40
  6. Step 6: Final answer
    x = 18,454.79

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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.