Home / 28,129.69-38,818.87-15,554.44

Finding the Fourth Proportional to 28,129.69, 38,818.87 and 15,554.44

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Solution

The fourth proportional to 28,129.69, 38,818.87 and 15,554.44 is: 21,465.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.69 : 38,818.87 = 15,554.44 : x
  2. Step 2: Convert to fraction form
    28,129.69/38,818.87 = 15,554.44/x
  3. Step 3: Cross multiply
    28,129.69x = 38,818.87 × 15,554.44
  4. Step 4: Simplify right side
    28,129.69x = 603,805,784.28
  5. Step 5: Solve for x
    x = 603,805,784.28/28,129.69
  6. Step 6: Final answer
    x = 21,465.07

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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.