Home / 13,390.93-18,482.07-7,729.35

Finding the Fourth Proportional to 13,390.93, 18,482.07 and 7,729.35

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Solution

The fourth proportional to 13,390.93, 18,482.07 and 7,729.35 is: 10,668.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.93 : 18,482.07 = 7,729.35 : x
  2. Step 2: Convert to fraction form
    13,390.93/18,482.07 = 7,729.35/x
  3. Step 3: Cross multiply
    13,390.93x = 18,482.07 × 7,729.35
  4. Step 4: Simplify right side
    13,390.93x = 142,854,387.75
  5. Step 5: Solve for x
    x = 142,854,387.75/13,390.93
  6. Step 6: Final answer
    x = 10,668.00

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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.