Home / 13,097.92-18,075.36-7,129.76

Finding the Fourth Proportional to 13,097.92, 18,075.36 and 7,129.76

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Solution

The fourth proportional to 13,097.92, 18,075.36 and 7,129.76 is: 9,839.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,097.92 : 18,075.36 = 7,129.76 : x
  2. Step 2: Convert to fraction form
    13,097.92/18,075.36 = 7,129.76/x
  3. Step 3: Cross multiply
    13,097.92x = 18,075.36 × 7,129.76
  4. Step 4: Simplify right side
    13,097.92x = 128,872,978.71
  5. Step 5: Solve for x
    x = 128,872,978.71/13,097.92
  6. Step 6: Final answer
    x = 9,839.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.