Home / 28,115.91-38,798.76-15,368.86

Finding the Fourth Proportional to 28,115.91, 38,798.76 and 15,368.86

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Solution

The fourth proportional to 28,115.91, 38,798.76 and 15,368.86 is: 21,208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.91 : 38,798.76 = 15,368.86 : x
  2. Step 2: Convert to fraction form
    28,115.91/38,798.76 = 15,368.86/x
  3. Step 3: Cross multiply
    28,115.91x = 38,798.76 × 15,368.86
  4. Step 4: Simplify right side
    28,115.91x = 596,292,710.61
  5. Step 5: Solve for x
    x = 596,292,710.61/28,115.91
  6. Step 6: Final answer
    x = 21,208.37

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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.