Home / 13,490.12-18,615.30-7,521.32

Finding the Fourth Proportional to 13,490.12, 18,615.30 and 7,521.32

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Solution

The fourth proportional to 13,490.12, 18,615.30 and 7,521.32 is: 10,378.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.12 : 18,615.30 = 7,521.32 : x
  2. Step 2: Convert to fraction form
    13,490.12/18,615.30 = 7,521.32/x
  3. Step 3: Cross multiply
    13,490.12x = 18,615.30 × 7,521.32
  4. Step 4: Simplify right side
    13,490.12x = 140,011,628.20
  5. Step 5: Solve for x
    x = 140,011,628.20/13,490.12
  6. Step 6: Final answer
    x = 10,378.83

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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.