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Finding the Fourth Proportional to 28,077.66, 38,747.67 and 15,501.66

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Solution

The fourth proportional to 28,077.66, 38,747.67 and 15,501.66 is: 21,392.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,077.66 : 38,747.67 = 15,501.66 : x
  2. Step 2: Convert to fraction form
    28,077.66/38,747.67 = 15,501.66/x
  3. Step 3: Cross multiply
    28,077.66x = 38,747.67 × 15,501.66
  4. Step 4: Simplify right side
    28,077.66x = 600,653,206.13
  5. Step 5: Solve for x
    x = 600,653,206.13/28,077.66
  6. Step 6: Final answer
    x = 21,392.57

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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.