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Finding the Fourth Proportional to 7,415.63, 11,123.45 and 2,221.50

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Solution

The fourth proportional to 7,415.63, 11,123.45 and 2,221.50 is: 3,332.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,415.63 : 11,123.45 = 2,221.50 : x
  2. Step 2: Convert to fraction form
    7,415.63/11,123.45 = 2,221.50/x
  3. Step 3: Cross multiply
    7,415.63x = 11,123.45 × 2,221.50
  4. Step 4: Simplify right side
    7,415.63x = 24,710,744.18
  5. Step 5: Solve for x
    x = 24,710,744.18/7,415.63
  6. Step 6: Final answer
    x = 3,332.25

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Double scale
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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.