Home / 21,153.42-31,730.54-7,110.86

Finding the Fourth Proportional to 21,153.42, 31,730.54 and 7,110.86

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Solution

The fourth proportional to 21,153.42, 31,730.54 and 7,110.86 is: 10,666.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.42 : 31,730.54 = 7,110.86 : x
  2. Step 2: Convert to fraction form
    21,153.42/31,730.54 = 7,110.86/x
  3. Step 3: Cross multiply
    21,153.42x = 31,730.54 × 7,110.86
  4. Step 4: Simplify right side
    21,153.42x = 225,631,233.46
  5. Step 5: Solve for x
    x = 225,631,233.46/21,153.42
  6. Step 6: Final answer
    x = 10,666.42

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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.