Home / 10,987.56-15,157.98-7,007.76

Finding the Fourth Proportional to 10,987.56, 15,157.98 and 7,007.76

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Solution

The fourth proportional to 10,987.56, 15,157.98 and 7,007.76 is: 9,667.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.56 : 15,157.98 = 7,007.76 : x
  2. Step 2: Convert to fraction form
    10,987.56/15,157.98 = 7,007.76/x
  3. Step 3: Cross multiply
    10,987.56x = 15,157.98 × 7,007.76
  4. Step 4: Simplify right side
    10,987.56x = 106,223,485.92
  5. Step 5: Solve for x
    x = 106,223,485.92/10,987.56
  6. Step 6: Final answer
    x = 9,667.61

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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.