Home / 15,405.03-21,258.83-8,690.72

Finding the Fourth Proportional to 15,405.03, 21,258.83 and 8,690.72

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Solution

The fourth proportional to 15,405.03, 21,258.83 and 8,690.72 is: 11,993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.03 : 21,258.83 = 8,690.72 : x
  2. Step 2: Convert to fraction form
    15,405.03/21,258.83 = 8,690.72/x
  3. Step 3: Cross multiply
    15,405.03x = 21,258.83 × 8,690.72
  4. Step 4: Simplify right side
    15,405.03x = 184,754,454.49
  5. Step 5: Solve for x
    x = 184,754,454.49/15,405.03
  6. Step 6: Final answer
    x = 11,993.13

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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.