Home / 28,527.96-39,368.28-15,781.68

Finding the Fourth Proportional to 28,527.96, 39,368.28 and 15,781.68

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Solution

The fourth proportional to 28,527.96, 39,368.28 and 15,781.68 is: 21,778.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,527.96 : 39,368.28 = 15,781.68 : x
  2. Step 2: Convert to fraction form
    28,527.96/39,368.28 = 15,781.68/x
  3. Step 3: Cross multiply
    28,527.96x = 39,368.28 × 15,781.68
  4. Step 4: Simplify right side
    28,527.96x = 621,297,597.11
  5. Step 5: Solve for x
    x = 621,297,597.11/28,527.96
  6. Step 6: Final answer
    x = 21,778.55

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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.