Home / 20,365.02-28,103.49-11,412.50

Finding the Fourth Proportional to 20,365.02, 28,103.49 and 11,412.50

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Solution

The fourth proportional to 20,365.02, 28,103.49 and 11,412.50 is: 15,749.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.02 : 28,103.49 = 11,412.50 : x
  2. Step 2: Convert to fraction form
    20,365.02/28,103.49 = 11,412.50/x
  3. Step 3: Cross multiply
    20,365.02x = 28,103.49 × 11,412.50
  4. Step 4: Simplify right side
    20,365.02x = 320,730,939.11
  5. Step 5: Solve for x
    x = 320,730,939.11/20,365.02
  6. Step 6: Final answer
    x = 15,749.11

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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.