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Finding the Fourth Proportional to 28,051.67, 38,710.46 and 15,305.10

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Solution

The fourth proportional to 28,051.67, 38,710.46 and 15,305.10 is: 21,120.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,051.67 : 38,710.46 = 15,305.10 : x
  2. Step 2: Convert to fraction form
    28,051.67/38,710.46 = 15,305.10/x
  3. Step 3: Cross multiply
    28,051.67x = 38,710.46 × 15,305.10
  4. Step 4: Simplify right side
    28,051.67x = 592,467,461.35
  5. Step 5: Solve for x
    x = 592,467,461.35/28,051.67
  6. Step 6: Final answer
    x = 21,120.58

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Double scale
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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.