Home / 28,555.08-39,405.39-15,807.52

Finding the Fourth Proportional to 28,555.08, 39,405.39 and 15,807.52

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Solution

The fourth proportional to 28,555.08, 39,405.39 and 15,807.52 is: 21,814.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.08 : 39,405.39 = 15,807.52 : x
  2. Step 2: Convert to fraction form
    28,555.08/39,405.39 = 15,807.52/x
  3. Step 3: Cross multiply
    28,555.08x = 39,405.39 × 15,807.52
  4. Step 4: Simplify right side
    28,555.08x = 622,901,490.53
  5. Step 5: Solve for x
    x = 622,901,490.53/28,555.08
  6. Step 6: Final answer
    x = 21,814.03

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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.