Home / 28,565.28-39,420.08-15,990.08

Finding the Fourth Proportional to 28,565.28, 39,420.08 and 15,990.08

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Solution

The fourth proportional to 28,565.28, 39,420.08 and 15,990.08 is: 22,066.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,565.28 : 39,420.08 = 15,990.08 : x
  2. Step 2: Convert to fraction form
    28,565.28/39,420.08 = 15,990.08/x
  3. Step 3: Cross multiply
    28,565.28x = 39,420.08 × 15,990.08
  4. Step 4: Simplify right side
    28,565.28x = 630,330,232.81
  5. Step 5: Solve for x
    x = 630,330,232.81/28,565.28
  6. Step 6: Final answer
    x = 22,066.31

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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.