Home / 10,285.80-15,428.70-2,890.50

Finding the Fourth Proportional to 10,285.80, 15,428.70 and 2,890.50

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Solution

The fourth proportional to 10,285.80, 15,428.70 and 2,890.50 is: 4,335.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,285.80 : 15,428.70 = 2,890.50 : x
  2. Step 2: Convert to fraction form
    10,285.80/15,428.70 = 2,890.50/x
  3. Step 3: Cross multiply
    10,285.80x = 15,428.70 × 2,890.50
  4. Step 4: Simplify right side
    10,285.80x = 44,596,657.35
  5. Step 5: Solve for x
    x = 44,596,657.35/10,285.80
  6. Step 6: Final answer
    x = 4,335.75

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.