Home / 21,088.85-29,091.32-13,911.67

Finding the Fourth Proportional to 21,088.85, 29,091.32 and 13,911.67

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Solution

The fourth proportional to 21,088.85, 29,091.32 and 13,911.67 is: 19,190.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,088.85 : 29,091.32 = 13,911.67 : x
  2. Step 2: Convert to fraction form
    21,088.85/29,091.32 = 13,911.67/x
  3. Step 3: Cross multiply
    21,088.85x = 29,091.32 × 13,911.67
  4. Step 4: Simplify right side
    21,088.85x = 404,708,701.42
  5. Step 5: Solve for x
    x = 404,708,701.42/21,088.85
  6. Step 6: Final answer
    x = 19,190.65

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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.