Home / 28,257.06-38,994.85-15,681.81

Finding the Fourth Proportional to 28,257.06, 38,994.85 and 15,681.81

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Solution

The fourth proportional to 28,257.06, 38,994.85 and 15,681.81 is: 21,640.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.06 : 38,994.85 = 15,681.81 : x
  2. Step 2: Convert to fraction form
    28,257.06/38,994.85 = 15,681.81/x
  3. Step 3: Cross multiply
    28,257.06x = 38,994.85 × 15,681.81
  4. Step 4: Simplify right side
    28,257.06x = 611,509,828.68
  5. Step 5: Solve for x
    x = 611,509,828.68/28,257.06
  6. Step 6: Final answer
    x = 21,640.96

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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.