Home / 20,985.57-31,497.80-10,604.61

Finding the Fourth Proportional to 20,985.57, 31,497.80 and 10,604.61

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Solution

The fourth proportional to 20,985.57, 31,497.80 and 10,604.61 is: 15,916.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.57 : 31,497.80 = 10,604.61 : x
  2. Step 2: Convert to fraction form
    20,985.57/31,497.80 = 10,604.61/x
  3. Step 3: Cross multiply
    20,985.57x = 31,497.80 × 10,604.61
  4. Step 4: Simplify right side
    20,985.57x = 334,021,831.83
  5. Step 5: Solve for x
    x = 334,021,831.83/20,985.57
  6. Step 6: Final answer
    x = 15,916.74

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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.