Home / 28,285.84-39,033.42-15,711.40

Finding the Fourth Proportional to 28,285.84, 39,033.42 and 15,711.40

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Solution

The fourth proportional to 28,285.84, 39,033.42 and 15,711.40 is: 21,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,285.84 : 39,033.42 = 15,711.40 : x
  2. Step 2: Convert to fraction form
    28,285.84/39,033.42 = 15,711.40/x
  3. Step 3: Cross multiply
    28,285.84x = 39,033.42 × 15,711.40
  4. Step 4: Simplify right side
    28,285.84x = 613,269,674.99
  5. Step 5: Solve for x
    x = 613,269,674.99/28,285.84
  6. Step 6: Final answer
    x = 21,681.15

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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.