Home / 28,740.00-39,657.72-15,990.18

Finding the Fourth Proportional to 28,740.00, 39,657.72 and 15,990.18

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Solution

The fourth proportional to 28,740.00, 39,657.72 and 15,990.18 is: 22,064.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,740.00 : 39,657.72 = 15,990.18 : x
  2. Step 2: Convert to fraction form
    28,740.00/39,657.72 = 15,990.18/x
  3. Step 3: Cross multiply
    28,740.00x = 39,657.72 × 15,990.18
  4. Step 4: Simplify right side
    28,740.00x = 634,133,992.44
  5. Step 5: Solve for x
    x = 634,133,992.44/28,740.00
  6. Step 6: Final answer
    x = 22,064.51

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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.