Home / 20,300.31-28,014.34-11,347.80

Finding the Fourth Proportional to 20,300.31, 28,014.34 and 11,347.80

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Solution

The fourth proportional to 20,300.31, 28,014.34 and 11,347.80 is: 15,659.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,300.31 : 28,014.34 = 11,347.80 : x
  2. Step 2: Convert to fraction form
    20,300.31/28,014.34 = 11,347.80/x
  3. Step 3: Cross multiply
    20,300.31x = 28,014.34 × 11,347.80
  4. Step 4: Simplify right side
    20,300.31x = 317,901,070.71
  5. Step 5: Solve for x
    x = 317,901,070.71/20,300.31
  6. Step 6: Final answer
    x = 15,659.92

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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.