Home / 21,230.94-29,271.15-13,663.74

Finding the Fourth Proportional to 21,230.94, 29,271.15 and 13,663.74

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Solution

The fourth proportional to 21,230.94, 29,271.15 and 13,663.74 is: 18,838.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.94 : 29,271.15 = 13,663.74 : x
  2. Step 2: Convert to fraction form
    21,230.94/29,271.15 = 13,663.74/x
  3. Step 3: Cross multiply
    21,230.94x = 29,271.15 × 13,663.74
  4. Step 4: Simplify right side
    21,230.94x = 399,953,383.10
  5. Step 5: Solve for x
    x = 399,953,383.10/21,230.94
  6. Step 6: Final answer
    x = 18,838.23

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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.