Home / 28,685.24-39,574.58-21,149.45

Finding the Fourth Proportional to 28,685.24, 39,574.58 and 21,149.45

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Solution

The fourth proportional to 28,685.24, 39,574.58 and 21,149.45 is: 29,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.24 : 39,574.58 = 21,149.45 : x
  2. Step 2: Convert to fraction form
    28,685.24/39,574.58 = 21,149.45/x
  3. Step 3: Cross multiply
    28,685.24x = 39,574.58 × 21,149.45
  4. Step 4: Simplify right side
    28,685.24x = 836,980,668.37
  5. Step 5: Solve for x
    x = 836,980,668.37/28,685.24
  6. Step 6: Final answer
    x = 29,178.10

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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.