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Finding the Fourth Proportional to 28,959.66, 39,971.07 and 16,388.46

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Solution

The fourth proportional to 28,959.66, 39,971.07 and 16,388.46 is: 22,619.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,959.66 : 39,971.07 = 16,388.46 : x
  2. Step 2: Convert to fraction form
    28,959.66/39,971.07 = 16,388.46/x
  3. Step 3: Cross multiply
    28,959.66x = 39,971.07 × 16,388.46
  4. Step 4: Simplify right side
    28,959.66x = 655,064,281.85
  5. Step 5: Solve for x
    x = 655,064,281.85/28,959.66
  6. Step 6: Final answer
    x = 22,619.89

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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.