Home / 28,320.89-39,083.79-15,574.59

Finding the Fourth Proportional to 28,320.89, 39,083.79 and 15,574.59

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Solution

The fourth proportional to 28,320.89, 39,083.79 and 15,574.59 is: 21,493.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,320.89 : 39,083.79 = 15,574.59 : x
  2. Step 2: Convert to fraction form
    28,320.89/39,083.79 = 15,574.59/x
  3. Step 3: Cross multiply
    28,320.89x = 39,083.79 × 15,574.59
  4. Step 4: Simplify right side
    28,320.89x = 608,714,004.90
  5. Step 5: Solve for x
    x = 608,714,004.90/28,320.89
  6. Step 6: Final answer
    x = 21,493.47

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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.