Home / 28,287.84-39,036.18-15,713.40

Finding the Fourth Proportional to 28,287.84, 39,036.18 and 15,713.40

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Solution

The fourth proportional to 28,287.84, 39,036.18 and 15,713.40 is: 21,683.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,287.84 : 39,036.18 = 15,713.40 : x
  2. Step 2: Convert to fraction form
    28,287.84/39,036.18 = 15,713.40/x
  3. Step 3: Cross multiply
    28,287.84x = 39,036.18 × 15,713.40
  4. Step 4: Simplify right side
    28,287.84x = 613,391,110.81
  5. Step 5: Solve for x
    x = 613,391,110.81/28,287.84
  6. Step 6: Final answer
    x = 21,683.91

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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.