Home / 28,479.18-39,300.48-15,732.66

Finding the Fourth Proportional to 28,479.18, 39,300.48 and 15,732.66

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Solution

The fourth proportional to 28,479.18, 39,300.48 and 15,732.66 is: 21,710.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.18 : 39,300.48 = 15,732.66 : x
  2. Step 2: Convert to fraction form
    28,479.18/39,300.48 = 15,732.66/x
  3. Step 3: Cross multiply
    28,479.18x = 39,300.48 × 15,732.66
  4. Step 4: Simplify right side
    28,479.18x = 618,301,089.68
  5. Step 5: Solve for x
    x = 618,301,089.68/28,479.18
  6. Step 6: Final answer
    x = 21,710.64

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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.