Home / 21,778.20-30,053.07-12,347.10

Finding the Fourth Proportional to 21,778.20, 30,053.07 and 12,347.10

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Solution

The fourth proportional to 21,778.20, 30,053.07 and 12,347.10 is: 17,038.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.20 : 30,053.07 = 12,347.10 : x
  2. Step 2: Convert to fraction form
    21,778.20/30,053.07 = 12,347.10/x
  3. Step 3: Cross multiply
    21,778.20x = 30,053.07 × 12,347.10
  4. Step 4: Simplify right side
    21,778.20x = 371,068,260.60
  5. Step 5: Solve for x
    x = 371,068,260.60/21,778.20
  6. Step 6: Final answer
    x = 17,038.52

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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.