Home / 21,320.74-31,981.11-7,466.50

Finding the Fourth Proportional to 21,320.74, 31,981.11 and 7,466.50

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Solution

The fourth proportional to 21,320.74, 31,981.11 and 7,466.50 is: 11,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.74 : 31,981.11 = 7,466.50 : x
  2. Step 2: Convert to fraction form
    21,320.74/31,981.11 = 7,466.50/x
  3. Step 3: Cross multiply
    21,320.74x = 31,981.11 × 7,466.50
  4. Step 4: Simplify right side
    21,320.74x = 238,786,957.82
  5. Step 5: Solve for x
    x = 238,786,957.82/21,320.74
  6. Step 6: Final answer
    x = 11,199.75

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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.