Home / 28,557.08-39,408.15-15,809.52

Finding the Fourth Proportional to 28,557.08, 39,408.15 and 15,809.52

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Solution

The fourth proportional to 28,557.08, 39,408.15 and 15,809.52 is: 21,816.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.08 : 39,408.15 = 15,809.52 : x
  2. Step 2: Convert to fraction form
    28,557.08/39,408.15 = 15,809.52/x
  3. Step 3: Cross multiply
    28,557.08x = 39,408.15 × 15,809.52
  4. Step 4: Simplify right side
    28,557.08x = 623,023,935.59
  5. Step 5: Solve for x
    x = 623,023,935.59/28,557.08
  6. Step 6: Final answer
    x = 21,816.79

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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.