Home / 20,340.48-28,070.10-11,388.77

Finding the Fourth Proportional to 20,340.48, 28,070.10 and 11,388.77

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Solution

The fourth proportional to 20,340.48, 28,070.10 and 11,388.77 is: 15,716.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.48 : 28,070.10 = 11,388.77 : x
  2. Step 2: Convert to fraction form
    20,340.48/28,070.10 = 11,388.77/x
  3. Step 3: Cross multiply
    20,340.48x = 28,070.10 × 11,388.77
  4. Step 4: Simplify right side
    20,340.48x = 319,683,772.43
  5. Step 5: Solve for x
    x = 319,683,772.43/20,340.48
  6. Step 6: Final answer
    x = 15,716.63

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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.