Home / 28,830.90-39,786.68-15,909.87

Finding the Fourth Proportional to 28,830.90, 39,786.68 and 15,909.87

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Solution

The fourth proportional to 28,830.90, 39,786.68 and 15,909.87 is: 21,955.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,830.90 : 39,786.68 = 15,909.87 : x
  2. Step 2: Convert to fraction form
    28,830.90/39,786.68 = 15,909.87/x
  3. Step 3: Cross multiply
    28,830.90x = 39,786.68 × 15,909.87
  4. Step 4: Simplify right side
    28,830.90x = 633,000,871.71
  5. Step 5: Solve for x
    x = 633,000,871.71/28,830.90
  6. Step 6: Final answer
    x = 21,955.64

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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.