Home / 13,490.03-18,615.36-7,521.35

Finding the Fourth Proportional to 13,490.03, 18,615.36 and 7,521.35

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Solution

The fourth proportional to 13,490.03, 18,615.36 and 7,521.35 is: 10,378.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.03 : 18,615.36 = 7,521.35 : x
  2. Step 2: Convert to fraction form
    13,490.03/18,615.36 = 7,521.35/x
  3. Step 3: Cross multiply
    13,490.03x = 18,615.36 × 7,521.35
  4. Step 4: Simplify right side
    13,490.03x = 140,012,544.86
  5. Step 5: Solve for x
    x = 140,012,544.86/13,490.03
  6. Step 6: Final answer
    x = 10,378.97

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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.