Home / 28,420.04-39,218.75-15,673.76

Finding the Fourth Proportional to 28,420.04, 39,218.75 and 15,673.76

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Solution

The fourth proportional to 28,420.04, 39,218.75 and 15,673.76 is: 21,629.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.04 : 39,218.75 = 15,673.76 : x
  2. Step 2: Convert to fraction form
    28,420.04/39,218.75 = 15,673.76/x
  3. Step 3: Cross multiply
    28,420.04x = 39,218.75 × 15,673.76
  4. Step 4: Simplify right side
    28,420.04x = 614,705,000.54
  5. Step 5: Solve for x
    x = 614,705,000.54/28,420.04
  6. Step 6: Final answer
    x = 21,629.28

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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.