Home / 21,360.90-29,478.12-11,929.46

Finding the Fourth Proportional to 21,360.90, 29,478.12 and 11,929.46

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Solution

The fourth proportional to 21,360.90, 29,478.12 and 11,929.46 is: 16,462.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.90 : 29,478.12 = 11,929.46 : x
  2. Step 2: Convert to fraction form
    21,360.90/29,478.12 = 11,929.46/x
  3. Step 3: Cross multiply
    21,360.90x = 29,478.12 × 11,929.46
  4. Step 4: Simplify right side
    21,360.90x = 351,657,906.02
  5. Step 5: Solve for x
    x = 351,657,906.02/21,360.90
  6. Step 6: Final answer
    x = 16,462.69

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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.