Home / 21,000.88-28,981.21-11,570.05

Finding the Fourth Proportional to 21,000.88, 28,981.21 and 11,570.05

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Solution

The fourth proportional to 21,000.88, 28,981.21 and 11,570.05 is: 15,966.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.88 : 28,981.21 = 11,570.05 : x
  2. Step 2: Convert to fraction form
    21,000.88/28,981.21 = 11,570.05/x
  3. Step 3: Cross multiply
    21,000.88x = 28,981.21 × 11,570.05
  4. Step 4: Simplify right side
    21,000.88x = 335,313,903.85
  5. Step 5: Solve for x
    x = 335,313,903.85/21,000.88
  6. Step 6: Final answer
    x = 15,966.66

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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.