Home / 21,681.99-29,919.49-13,182.94

Finding the Fourth Proportional to 21,681.99, 29,919.49 and 13,182.94

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Solution

The fourth proportional to 21,681.99, 29,919.49 and 13,182.94 is: 18,191.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.99 : 29,919.49 = 13,182.94 : x
  2. Step 2: Convert to fraction form
    21,681.99/29,919.49 = 13,182.94/x
  3. Step 3: Cross multiply
    21,681.99x = 29,919.49 × 13,182.94
  4. Step 4: Simplify right side
    21,681.99x = 394,426,841.50
  5. Step 5: Solve for x
    x = 394,426,841.50/21,681.99
  6. Step 6: Final answer
    x = 18,191.45

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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.