Home / 39,140.72-58,717.60-12,838.40

Finding the Fourth Proportional to 39,140.72, 58,717.60 and 12,838.40

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Solution

The fourth proportional to 39,140.72, 58,717.60 and 12,838.40 is: 19,259.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,140.72 : 58,717.60 = 12,838.40 : x
  2. Step 2: Convert to fraction form
    39,140.72/58,717.60 = 12,838.40/x
  3. Step 3: Cross multiply
    39,140.72x = 58,717.60 × 12,838.40
  4. Step 4: Simplify right side
    39,140.72x = 753,840,035.84
  5. Step 5: Solve for x
    x = 753,840,035.84/39,140.72
  6. Step 6: Final answer
    x = 19,259.74

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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.