Home / 28,376.81-39,159.53-15,631.21

Finding the Fourth Proportional to 28,376.81, 39,159.53 and 15,631.21

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Solution

The fourth proportional to 28,376.81, 39,159.53 and 15,631.21 is: 21,570.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,376.81 : 39,159.53 = 15,631.21 : x
  2. Step 2: Convert to fraction form
    28,376.81/39,159.53 = 15,631.21/x
  3. Step 3: Cross multiply
    28,376.81x = 39,159.53 × 15,631.21
  4. Step 4: Simplify right side
    28,376.81x = 612,110,836.93
  5. Step 5: Solve for x
    x = 612,110,836.93/28,376.81
  6. Step 6: Final answer
    x = 21,570.81

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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.