Home / 21,054.81-31,565.45-12,160.05

Finding the Fourth Proportional to 21,054.81, 31,565.45 and 12,160.05

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Solution

The fourth proportional to 21,054.81, 31,565.45 and 12,160.05 is: 18,230.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.81 : 31,565.45 = 12,160.05 : x
  2. Step 2: Convert to fraction form
    21,054.81/31,565.45 = 12,160.05/x
  3. Step 3: Cross multiply
    21,054.81x = 31,565.45 × 12,160.05
  4. Step 4: Simplify right side
    21,054.81x = 383,837,389.47
  5. Step 5: Solve for x
    x = 383,837,389.47/21,054.81
  6. Step 6: Final answer
    x = 18,230.39

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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.