Home / 39,143.40-58,722.42-12,855.72

Finding the Fourth Proportional to 39,143.40, 58,722.42 and 12,855.72

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Solution

The fourth proportional to 39,143.40, 58,722.42 and 12,855.72 is: 19,285.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,143.40 : 58,722.42 = 12,855.72 : x
  2. Step 2: Convert to fraction form
    39,143.40/58,722.42 = 12,855.72/x
  3. Step 3: Cross multiply
    39,143.40x = 58,722.42 × 12,855.72
  4. Step 4: Simplify right side
    39,143.40x = 754,918,989.24
  5. Step 5: Solve for x
    x = 754,918,989.24/39,143.40
  6. Step 6: Final answer
    x = 19,285.98

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1.5x scale

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.