Home / 21,686.06-29,931.66-12,260.06

Finding the Fourth Proportional to 21,686.06, 29,931.66 and 12,260.06

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Solution

The fourth proportional to 21,686.06, 29,931.66 and 12,260.06 is: 16,921.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.06 : 29,931.66 = 12,260.06 : x
  2. Step 2: Convert to fraction form
    21,686.06/29,931.66 = 12,260.06/x
  3. Step 3: Cross multiply
    21,686.06x = 29,931.66 × 12,260.06
  4. Step 4: Simplify right side
    21,686.06x = 366,963,947.50
  5. Step 5: Solve for x
    x = 366,963,947.50/21,686.06
  6. Step 6: Final answer
    x = 16,921.65

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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.