Home / 28,587.93-39,449.88-15,840.78

Finding the Fourth Proportional to 28,587.93, 39,449.88 and 15,840.78

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Solution

The fourth proportional to 28,587.93, 39,449.88 and 15,840.78 is: 21,859.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.93 : 39,449.88 = 15,840.78 : x
  2. Step 2: Convert to fraction form
    28,587.93/39,449.88 = 15,840.78/x
  3. Step 3: Cross multiply
    28,587.93x = 39,449.88 × 15,840.78
  4. Step 4: Simplify right side
    28,587.93x = 624,916,870.11
  5. Step 5: Solve for x
    x = 624,916,870.11/28,587.93
  6. Step 6: Final answer
    x = 21,859.47

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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.