Home / 11,115.79-15,332.56-7,130.59

Finding the Fourth Proportional to 11,115.79, 15,332.56 and 7,130.59

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Solution

The fourth proportional to 11,115.79, 15,332.56 and 7,130.59 is: 9,835.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.79 : 15,332.56 = 7,130.59 : x
  2. Step 2: Convert to fraction form
    11,115.79/15,332.56 = 7,130.59/x
  3. Step 3: Cross multiply
    11,115.79x = 15,332.56 × 7,130.59
  4. Step 4: Simplify right side
    11,115.79x = 109,330,199.01
  5. Step 5: Solve for x
    x = 109,330,199.01/11,115.79
  6. Step 6: Final answer
    x = 9,835.58

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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.