Home / 21,117.08-31,632.28-10,555.50

Finding the Fourth Proportional to 21,117.08, 31,632.28 and 10,555.50

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Solution

The fourth proportional to 21,117.08, 31,632.28 and 10,555.50 is: 15,811.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.08 : 31,632.28 = 10,555.50 : x
  2. Step 2: Convert to fraction form
    21,117.08/31,632.28 = 10,555.50/x
  3. Step 3: Cross multiply
    21,117.08x = 31,632.28 × 10,555.50
  4. Step 4: Simplify right side
    21,117.08x = 333,894,531.54
  5. Step 5: Solve for x
    x = 333,894,531.54/21,117.08
  6. Step 6: Final answer
    x = 15,811.59

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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.