Home / 12,559.36-17,338.32-9,720.40

Finding the Fourth Proportional to 12,559.36, 17,338.32 and 9,720.40

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Solution

The fourth proportional to 12,559.36, 17,338.32 and 9,720.40 is: 13,419.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,559.36 : 17,338.32 = 9,720.40 : x
  2. Step 2: Convert to fraction form
    12,559.36/17,338.32 = 9,720.40/x
  3. Step 3: Cross multiply
    12,559.36x = 17,338.32 × 9,720.40
  4. Step 4: Simplify right side
    12,559.36x = 168,535,405.73
  5. Step 5: Solve for x
    x = 168,535,405.73/12,559.36
  6. Step 6: Final answer
    x = 13,419.11

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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.