Home / 21,151.05-29,188.44-12,653.53

Finding the Fourth Proportional to 21,151.05, 29,188.44 and 12,653.53

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Solution

The fourth proportional to 21,151.05, 29,188.44 and 12,653.53 is: 17,461.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.05 : 29,188.44 = 12,653.53 : x
  2. Step 2: Convert to fraction form
    21,151.05/29,188.44 = 12,653.53/x
  3. Step 3: Cross multiply
    21,151.05x = 29,188.44 × 12,653.53
  4. Step 4: Simplify right side
    21,151.05x = 369,336,728.22
  5. Step 5: Solve for x
    x = 369,336,728.22/21,151.05
  6. Step 6: Final answer
    x = 17,461.87

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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.