Home / 15,502.05-21,393.09-8,428.68

Finding the Fourth Proportional to 15,502.05, 21,393.09 and 8,428.68

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Solution

The fourth proportional to 15,502.05, 21,393.09 and 8,428.68 is: 11,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,502.05 : 21,393.09 = 8,428.68 : x
  2. Step 2: Convert to fraction form
    15,502.05/21,393.09 = 8,428.68/x
  3. Step 3: Cross multiply
    15,502.05x = 21,393.09 × 8,428.68
  4. Step 4: Simplify right side
    15,502.05x = 180,315,509.82
  5. Step 5: Solve for x
    x = 180,315,509.82/15,502.05
  6. Step 6: Final answer
    x = 11,631.72

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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.