Home / 9,789.78-13,509.91-5,313.53

Finding the Fourth Proportional to 9,789.78, 13,509.91 and 5,313.53

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Solution

The fourth proportional to 9,789.78, 13,509.91 and 5,313.53 is: 7,332.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,789.78 : 13,509.91 = 5,313.53 : x
  2. Step 2: Convert to fraction form
    9,789.78/13,509.91 = 5,313.53/x
  3. Step 3: Cross multiply
    9,789.78x = 13,509.91 × 5,313.53
  4. Step 4: Simplify right side
    9,789.78x = 71,785,312.08
  5. Step 5: Solve for x
    x = 71,785,312.08/9,789.78
  6. Step 6: Final answer
    x = 7,332.68

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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.