Home / 20,731.50-28,586.87-14,005.45

Finding the Fourth Proportional to 20,731.50, 28,586.87 and 14,005.45

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Solution

The fourth proportional to 20,731.50, 28,586.87 and 14,005.45 is: 19,312.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.50 : 28,586.87 = 14,005.45 : x
  2. Step 2: Convert to fraction form
    20,731.50/28,586.87 = 14,005.45/x
  3. Step 3: Cross multiply
    20,731.50x = 28,586.87 × 14,005.45
  4. Step 4: Simplify right side
    20,731.50x = 400,371,944.15
  5. Step 5: Solve for x
    x = 400,371,944.15/20,731.50
  6. Step 6: Final answer
    x = 19,312.25

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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.