Home / 28,287.48-39,035.16-15,711.96

Finding the Fourth Proportional to 28,287.48, 39,035.16 and 15,711.96

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Solution

The fourth proportional to 28,287.48, 39,035.16 and 15,711.96 is: 21,681.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,287.48 : 39,035.16 = 15,711.96 : x
  2. Step 2: Convert to fraction form
    28,287.48/39,035.16 = 15,711.96/x
  3. Step 3: Cross multiply
    28,287.48x = 39,035.16 × 15,711.96
  4. Step 4: Simplify right side
    28,287.48x = 613,318,872.51
  5. Step 5: Solve for x
    x = 613,318,872.51/28,287.48
  6. Step 6: Final answer
    x = 21,681.64

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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.