Home / 21,289.68-31,934.45-11,807.80

Finding the Fourth Proportional to 21,289.68, 31,934.45 and 11,807.80

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Solution

The fourth proportional to 21,289.68, 31,934.45 and 11,807.80 is: 17,711.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.68 : 31,934.45 = 11,807.80 : x
  2. Step 2: Convert to fraction form
    21,289.68/31,934.45 = 11,807.80/x
  3. Step 3: Cross multiply
    21,289.68x = 31,934.45 × 11,807.80
  4. Step 4: Simplify right side
    21,289.68x = 377,075,548.39
  5. Step 5: Solve for x
    x = 377,075,548.39/21,289.68
  6. Step 6: Final answer
    x = 17,711.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.