Home / 57,868.07-86,780.09-20,421.17

Finding the Fourth Proportional to 57,868.07, 86,780.09 and 20,421.17

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Solution

The fourth proportional to 57,868.07, 86,780.09 and 20,421.17 is: 30,623.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,868.07 : 86,780.09 = 20,421.17 : x
  2. Step 2: Convert to fraction form
    57,868.07/86,780.09 = 20,421.17/x
  3. Step 3: Cross multiply
    57,868.07x = 86,780.09 × 20,421.17
  4. Step 4: Simplify right side
    57,868.07x = 1,772,150,434.50
  5. Step 5: Solve for x
    x = 1,772,150,434.50/57,868.07
  6. Step 6: Final answer
    x = 30,623.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.