Home / 9,888.09-13,645.91-5,639.79

Finding the Fourth Proportional to 9,888.09, 13,645.91 and 5,639.79

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Solution

The fourth proportional to 9,888.09, 13,645.91 and 5,639.79 is: 7,783.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888.09 : 13,645.91 = 5,639.79 : x
  2. Step 2: Convert to fraction form
    9,888.09/13,645.91 = 5,639.79/x
  3. Step 3: Cross multiply
    9,888.09x = 13,645.91 × 5,639.79
  4. Step 4: Simplify right side
    9,888.09x = 76,960,038.56
  5. Step 5: Solve for x
    x = 76,960,038.56/9,888.09
  6. Step 6: Final answer
    x = 7,783.10

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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.