Home / 28,421.16-39,221.64-15,674.28

Finding the Fourth Proportional to 28,421.16, 39,221.64 and 15,674.28

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Solution

The fourth proportional to 28,421.16, 39,221.64 and 15,674.28 is: 21,630.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.16 : 39,221.64 = 15,674.28 : x
  2. Step 2: Convert to fraction form
    28,421.16/39,221.64 = 15,674.28/x
  3. Step 3: Cross multiply
    28,421.16x = 39,221.64 × 15,674.28
  4. Step 4: Simplify right side
    28,421.16x = 614,770,967.42
  5. Step 5: Solve for x
    x = 614,770,967.42/28,421.16
  6. Step 6: Final answer
    x = 21,630.75

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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.