Home / 28,215.30-38,927.28-21,490.29

Finding the Fourth Proportional to 28,215.30, 38,927.28 and 21,490.29

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Solution

The fourth proportional to 28,215.30, 38,927.28 and 21,490.29 is: 29,649.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.30 : 38,927.28 = 21,490.29 : x
  2. Step 2: Convert to fraction form
    28,215.30/38,927.28 = 21,490.29/x
  3. Step 3: Cross multiply
    28,215.30x = 38,927.28 × 21,490.29
  4. Step 4: Simplify right side
    28,215.30x = 836,558,536.11
  5. Step 5: Solve for x
    x = 836,558,536.11/28,215.30
  6. Step 6: Final answer
    x = 29,649.11

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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.