Home / 15,428.61-21,286.80-9,458.10

Finding the Fourth Proportional to 15,428.61, 21,286.80 and 9,458.10

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Solution

The fourth proportional to 15,428.61, 21,286.80 and 9,458.10 is: 13,049.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.61 : 21,286.80 = 9,458.10 : x
  2. Step 2: Convert to fraction form
    15,428.61/21,286.80 = 9,458.10/x
  3. Step 3: Cross multiply
    15,428.61x = 21,286.80 × 9,458.10
  4. Step 4: Simplify right side
    15,428.61x = 201,332,683.08
  5. Step 5: Solve for x
    x = 201,332,683.08/15,428.61
  6. Step 6: Final answer
    x = 13,049.31

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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.