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Finding the Fourth Proportional to 10,359.70, 15,539.55 and 10,143.70

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Solution

The fourth proportional to 10,359.70, 15,539.55 and 10,143.70 is: 15,215.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,359.70 : 15,539.55 = 10,143.70 : x
  2. Step 2: Convert to fraction form
    10,359.70/15,539.55 = 10,143.70/x
  3. Step 3: Cross multiply
    10,359.70x = 15,539.55 × 10,143.70
  4. Step 4: Simplify right side
    10,359.70x = 157,628,533.34
  5. Step 5: Solve for x
    x = 157,628,533.34/10,359.70
  6. Step 6: Final answer
    x = 15,215.55

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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.