Home / 28,254.76-38,991.72-15,679.51

Finding the Fourth Proportional to 28,254.76, 38,991.72 and 15,679.51

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Solution

The fourth proportional to 28,254.76, 38,991.72 and 15,679.51 is: 21,637.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.76 : 38,991.72 = 15,679.51 : x
  2. Step 2: Convert to fraction form
    28,254.76/38,991.72 = 15,679.51/x
  3. Step 3: Cross multiply
    28,254.76x = 38,991.72 × 15,679.51
  4. Step 4: Simplify right side
    28,254.76x = 611,371,063.66
  5. Step 5: Solve for x
    x = 611,371,063.66/28,254.76
  6. Step 6: Final answer
    x = 21,637.81

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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.