Home / 28,565.68-39,420.64-15,990.44

Finding the Fourth Proportional to 28,565.68, 39,420.64 and 15,990.44

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Solution

The fourth proportional to 28,565.68, 39,420.64 and 15,990.44 is: 22,066.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,565.68 : 39,420.64 = 15,990.44 : x
  2. Step 2: Convert to fraction form
    28,565.68/39,420.64 = 15,990.44/x
  3. Step 3: Cross multiply
    28,565.68x = 39,420.64 × 15,990.44
  4. Step 4: Simplify right side
    28,565.68x = 630,353,378.68
  5. Step 5: Solve for x
    x = 630,353,378.68/28,565.68
  6. Step 6: Final answer
    x = 22,066.81

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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.