Home / 21,089.27-31,636.70-7,760.45

Finding the Fourth Proportional to 21,089.27, 31,636.70 and 7,760.45

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Solution

The fourth proportional to 21,089.27, 31,636.70 and 7,760.45 is: 11,641.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.27 : 31,636.70 = 7,760.45 : x
  2. Step 2: Convert to fraction form
    21,089.27/31,636.70 = 7,760.45/x
  3. Step 3: Cross multiply
    21,089.27x = 31,636.70 × 7,760.45
  4. Step 4: Simplify right side
    21,089.27x = 245,514,831.53
  5. Step 5: Solve for x
    x = 245,514,831.53/21,089.27
  6. Step 6: Final answer
    x = 11,641.70

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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.