Home / 20,308.50-28,026.81-11,355.45

Finding the Fourth Proportional to 20,308.50, 28,026.81 and 11,355.45

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Solution

The fourth proportional to 20,308.50, 28,026.81 and 11,355.45 is: 15,671.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,308.50 : 28,026.81 = 11,355.45 : x
  2. Step 2: Convert to fraction form
    20,308.50/28,026.81 = 11,355.45/x
  3. Step 3: Cross multiply
    20,308.50x = 28,026.81 × 11,355.45
  4. Step 4: Simplify right side
    20,308.50x = 318,257,039.61
  5. Step 5: Solve for x
    x = 318,257,039.61/20,308.50
  6. Step 6: Final answer
    x = 15,671.12

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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.