Home / 13,521.10-18,659.26-7,856.32

Finding the Fourth Proportional to 13,521.10, 18,659.26 and 7,856.32

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Solution

The fourth proportional to 13,521.10, 18,659.26 and 7,856.32 is: 10,841.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.10 : 18,659.26 = 7,856.32 : x
  2. Step 2: Convert to fraction form
    13,521.10/18,659.26 = 7,856.32/x
  3. Step 3: Cross multiply
    13,521.10x = 18,659.26 × 7,856.32
  4. Step 4: Simplify right side
    13,521.10x = 146,593,117.52
  5. Step 5: Solve for x
    x = 146,593,117.52/13,521.10
  6. Step 6: Final answer
    x = 10,841.80

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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.