Home / 21,285.88-29,373.38-12,210.78

Finding the Fourth Proportional to 21,285.88, 29,373.38 and 12,210.78

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Solution

The fourth proportional to 21,285.88, 29,373.38 and 12,210.78 is: 16,850.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.88 : 29,373.38 = 12,210.78 : x
  2. Step 2: Convert to fraction form
    21,285.88/29,373.38 = 12,210.78/x
  3. Step 3: Cross multiply
    21,285.88x = 29,373.38 × 12,210.78
  4. Step 4: Simplify right side
    21,285.88x = 358,671,881.04
  5. Step 5: Solve for x
    x = 358,671,881.04/21,285.88
  6. Step 6: Final answer
    x = 16,850.23

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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.