Home / 21,009.20-28,952.78-15,030.48

Finding the Fourth Proportional to 21,009.20, 28,952.78 and 15,030.48

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Solution

The fourth proportional to 21,009.20, 28,952.78 and 15,030.48 is: 20,713.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.20 : 28,952.78 = 15,030.48 : x
  2. Step 2: Convert to fraction form
    21,009.20/28,952.78 = 15,030.48/x
  3. Step 3: Cross multiply
    21,009.20x = 28,952.78 × 15,030.48
  4. Step 4: Simplify right side
    21,009.20x = 435,174,214.15
  5. Step 5: Solve for x
    x = 435,174,214.15/21,009.20
  6. Step 6: Final answer
    x = 20,713.51

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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.