Home / 5,139.13-7,707.07-1,440.40

Finding the Fourth Proportional to 5,139.13, 7,707.07 and 1,440.40

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Solution

The fourth proportional to 5,139.13, 7,707.07 and 1,440.40 is: 2,160.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.13 : 7,707.07 = 1,440.40 : x
  2. Step 2: Convert to fraction form
    5,139.13/7,707.07 = 1,440.40/x
  3. Step 3: Cross multiply
    5,139.13x = 7,707.07 × 1,440.40
  4. Step 4: Simplify right side
    5,139.13x = 11,101,263.63
  5. Step 5: Solve for x
    x = 11,101,263.63/5,139.13
  6. Step 6: Final answer
    x = 2,160.14

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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.