Home / 28,218.04-38,940.30-15,642.52

Finding the Fourth Proportional to 28,218.04, 38,940.30 and 15,642.52

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Solution

The fourth proportional to 28,218.04, 38,940.30 and 15,642.52 is: 21,586.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.04 : 38,940.30 = 15,642.52 : x
  2. Step 2: Convert to fraction form
    28,218.04/38,940.30 = 15,642.52/x
  3. Step 3: Cross multiply
    28,218.04x = 38,940.30 × 15,642.52
  4. Step 4: Simplify right side
    28,218.04x = 609,124,421.56
  5. Step 5: Solve for x
    x = 609,124,421.56/28,218.04
  6. Step 6: Final answer
    x = 21,586.35

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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.