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Finding the Fourth Proportional to 15,666.99, 21,608.22 and 9,701.97

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Solution

The fourth proportional to 15,666.99, 21,608.22 and 9,701.97 is: 13,381.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.99 : 21,608.22 = 9,701.97 : x
  2. Step 2: Convert to fraction form
    15,666.99/21,608.22 = 9,701.97/x
  3. Step 3: Cross multiply
    15,666.99x = 21,608.22 × 9,701.97
  4. Step 4: Simplify right side
    15,666.99x = 209,642,302.19
  5. Step 5: Solve for x
    x = 209,642,302.19/15,666.99
  6. Step 6: Final answer
    x = 13,381.15

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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.