Home / 28,118.10-38,808-21,393.48

Finding the Fourth Proportional to 28,118.10, 38,808 and 21,393.48

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Solution

The fourth proportional to 28,118.10, 38,808 and 21,393.48 is: 29,526.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.10 : 38,808 = 21,393.48 : x
  2. Step 2: Convert to fraction form
    28,118.10/38,808 = 21,393.48/x
  3. Step 3: Cross multiply
    28,118.10x = 38,808 × 21,393.48
  4. Step 4: Simplify right side
    28,118.10x = 830,238,171.84
  5. Step 5: Solve for x
    x = 830,238,171.84/28,118.10
  6. Step 6: Final answer
    x = 29,526.82

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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.