Home / 21,056.91-29,032.28-13,490.81

Finding the Fourth Proportional to 21,056.91, 29,032.28 and 13,490.81

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Solution

The fourth proportional to 21,056.91, 29,032.28 and 13,490.81 is: 18,600.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056.91 : 29,032.28 = 13,490.81 : x
  2. Step 2: Convert to fraction form
    21,056.91/29,032.28 = 13,490.81/x
  3. Step 3: Cross multiply
    21,056.91x = 29,032.28 × 13,490.81
  4. Step 4: Simplify right side
    21,056.91x = 391,668,811.32
  5. Step 5: Solve for x
    x = 391,668,811.32/21,056.91
  6. Step 6: Final answer
    x = 18,600.49

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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.