Home / 21,051.23-31,483.89-18,727.61

Finding the Fourth Proportional to 21,051.23, 31,483.89 and 18,727.61

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Solution

The fourth proportional to 21,051.23, 31,483.89 and 18,727.61 is: 28,008.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.23 : 31,483.89 = 18,727.61 : x
  2. Step 2: Convert to fraction form
    21,051.23/31,483.89 = 18,727.61/x
  3. Step 3: Cross multiply
    21,051.23x = 31,483.89 × 18,727.61
  4. Step 4: Simplify right side
    21,051.23x = 589,617,855.78
  5. Step 5: Solve for x
    x = 589,617,855.78/21,051.23
  6. Step 6: Final answer
    x = 28,008.72

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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.