Home / 28,731.13-39,649.26-15,810.57

Finding the Fourth Proportional to 28,731.13, 39,649.26 and 15,810.57

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Solution

The fourth proportional to 28,731.13, 39,649.26 and 15,810.57 is: 21,818.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,731.13 : 39,649.26 = 15,810.57 : x
  2. Step 2: Convert to fraction form
    28,731.13/39,649.26 = 15,810.57/x
  3. Step 3: Cross multiply
    28,731.13x = 39,649.26 × 15,810.57
  4. Step 4: Simplify right side
    28,731.13x = 626,877,400.68
  5. Step 5: Solve for x
    x = 626,877,400.68/28,731.13
  6. Step 6: Final answer
    x = 21,818.75

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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.