Home / 20,648.96-28,501.20-12,153.81

Finding the Fourth Proportional to 20,648.96, 28,501.20 and 12,153.81

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Solution

The fourth proportional to 20,648.96, 28,501.20 and 12,153.81 is: 16,775.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.96 : 28,501.20 = 12,153.81 : x
  2. Step 2: Convert to fraction form
    20,648.96/28,501.20 = 12,153.81/x
  3. Step 3: Cross multiply
    20,648.96x = 28,501.20 × 12,153.81
  4. Step 4: Simplify right side
    20,648.96x = 346,398,108.80
  5. Step 5: Solve for x
    x = 346,398,108.80/20,648.96
  6. Step 6: Final answer
    x = 16,775.57

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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.