Home / 28,157.85-38,856.24-15,408.63

Finding the Fourth Proportional to 28,157.85, 38,856.24 and 15,408.63

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Solution

The fourth proportional to 28,157.85, 38,856.24 and 15,408.63 is: 21,263.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.85 : 38,856.24 = 15,408.63 : x
  2. Step 2: Convert to fraction form
    28,157.85/38,856.24 = 15,408.63/x
  3. Step 3: Cross multiply
    28,157.85x = 38,856.24 × 15,408.63
  4. Step 4: Simplify right side
    28,157.85x = 598,721,425.35
  5. Step 5: Solve for x
    x = 598,721,425.35/28,157.85
  6. Step 6: Final answer
    x = 21,263.04

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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.