Home / 28,412.55-39,210-15,666.59

Finding the Fourth Proportional to 28,412.55, 39,210 and 15,666.59

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Solution

The fourth proportional to 28,412.55, 39,210 and 15,666.59 is: 21,620.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.55 : 39,210 = 15,666.59 : x
  2. Step 2: Convert to fraction form
    28,412.55/39,210 = 15,666.59/x
  3. Step 3: Cross multiply
    28,412.55x = 39,210 × 15,666.59
  4. Step 4: Simplify right side
    28,412.55x = 614,286,993.90
  5. Step 5: Solve for x
    x = 614,286,993.90/28,412.55
  6. Step 6: Final answer
    x = 21,620.27

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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.