Home / 28,615.18-39,487.85-15,868.88

Finding the Fourth Proportional to 28,615.18, 39,487.85 and 15,868.88

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Solution

The fourth proportional to 28,615.18, 39,487.85 and 15,868.88 is: 21,898.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.18 : 39,487.85 = 15,868.88 : x
  2. Step 2: Convert to fraction form
    28,615.18/39,487.85 = 15,868.88/x
  3. Step 3: Cross multiply
    28,615.18x = 39,487.85 × 15,868.88
  4. Step 4: Simplify right side
    28,615.18x = 626,628,031.99
  5. Step 5: Solve for x
    x = 626,628,031.99/28,615.18
  6. Step 6: Final answer
    x = 21,898.45

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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.