Home / 21,901.32-30,215.70-15,192.90

Finding the Fourth Proportional to 21,901.32, 30,215.70 and 15,192.90

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Solution

The fourth proportional to 21,901.32, 30,215.70 and 15,192.90 is: 20,960.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,901.32 : 30,215.70 = 15,192.90 : x
  2. Step 2: Convert to fraction form
    21,901.32/30,215.70 = 15,192.90/x
  3. Step 3: Cross multiply
    21,901.32x = 30,215.70 × 15,192.90
  4. Step 4: Simplify right side
    21,901.32x = 459,064,108.53
  5. Step 5: Solve for x
    x = 459,064,108.53/21,901.32
  6. Step 6: Final answer
    x = 20,960.57

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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.