Home / 5,221.40-7,201.50-3,123.32

Finding the Fourth Proportional to 5,221.40, 7,201.50 and 3,123.32

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Solution

The fourth proportional to 5,221.40, 7,201.50 and 3,123.32 is: 4,307.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.40 : 7,201.50 = 3,123.32 : x
  2. Step 2: Convert to fraction form
    5,221.40/7,201.50 = 3,123.32/x
  3. Step 3: Cross multiply
    5,221.40x = 7,201.50 × 3,123.32
  4. Step 4: Simplify right side
    5,221.40x = 22,492,588.98
  5. Step 5: Solve for x
    x = 22,492,588.98/5,221.40
  6. Step 6: Final answer
    x = 4,307.77

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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.