Home / 39,435.20-59,138.40-13,140.80

Finding the Fourth Proportional to 39,435.20, 59,138.40 and 13,140.80

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Solution

The fourth proportional to 39,435.20, 59,138.40 and 13,140.80 is: 19,706.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,435.20 : 59,138.40 = 13,140.80 : x
  2. Step 2: Convert to fraction form
    39,435.20/59,138.40 = 13,140.80/x
  3. Step 3: Cross multiply
    39,435.20x = 59,138.40 × 13,140.80
  4. Step 4: Simplify right side
    39,435.20x = 777,125,886.72
  5. Step 5: Solve for x
    x = 777,125,886.72/39,435.20
  6. Step 6: Final answer
    x = 19,706.40

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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.