Home / 28,875.76-39,881.36-19,427.92

Finding the Fourth Proportional to 28,875.76, 39,881.36 and 19,427.92

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Solution

The fourth proportional to 28,875.76, 39,881.36 and 19,427.92 is: 26,832.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,875.76 : 39,881.36 = 19,427.92 : x
  2. Step 2: Convert to fraction form
    28,875.76/39,881.36 = 19,427.92/x
  3. Step 3: Cross multiply
    28,875.76x = 39,881.36 × 19,427.92
  4. Step 4: Simplify right side
    28,875.76x = 774,811,871.57
  5. Step 5: Solve for x
    x = 774,811,871.57/28,875.76
  6. Step 6: Final answer
    x = 26,832.61

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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.