Home / 39,720.95-59,581.36-10,138.78

Finding the Fourth Proportional to 39,720.95, 59,581.36 and 10,138.78

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Solution

The fourth proportional to 39,720.95, 59,581.36 and 10,138.78 is: 15,208.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.95 : 59,581.36 = 10,138.78 : x
  2. Step 2: Convert to fraction form
    39,720.95/59,581.36 = 10,138.78/x
  3. Step 3: Cross multiply
    39,720.95x = 59,581.36 × 10,138.78
  4. Step 4: Simplify right side
    39,720.95x = 604,081,977.89
  5. Step 5: Solve for x
    x = 604,081,977.89/39,720.95
  6. Step 6: Final answer
    x = 15,208.15

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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.