Home / 21,965.79-30,312.93-12,275.25

Finding the Fourth Proportional to 21,965.79, 30,312.93 and 12,275.25

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Solution

The fourth proportional to 21,965.79, 30,312.93 and 12,275.25 is: 16,939.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,965.79 : 30,312.93 = 12,275.25 : x
  2. Step 2: Convert to fraction form
    21,965.79/30,312.93 = 12,275.25/x
  3. Step 3: Cross multiply
    21,965.79x = 30,312.93 × 12,275.25
  4. Step 4: Simplify right side
    21,965.79x = 372,098,793.98
  5. Step 5: Solve for x
    x = 372,098,793.98/21,965.79
  6. Step 6: Final answer
    x = 16,939.92

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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.