Home / 13,458.72-18,575.76-7,871.52

Finding the Fourth Proportional to 13,458.72, 18,575.76 and 7,871.52

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Solution

The fourth proportional to 13,458.72, 18,575.76 and 7,871.52 is: 10,864.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.72 : 18,575.76 = 7,871.52 : x
  2. Step 2: Convert to fraction form
    13,458.72/18,575.76 = 7,871.52/x
  3. Step 3: Cross multiply
    13,458.72x = 18,575.76 × 7,871.52
  4. Step 4: Simplify right side
    13,458.72x = 146,219,466.36
  5. Step 5: Solve for x
    x = 146,219,466.36/13,458.72
  6. Step 6: Final answer
    x = 10,864.29

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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.