Home / 9,938.10-13,712.64-6,400.80

Finding the Fourth Proportional to 9,938.10, 13,712.64 and 6,400.80

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Solution

The fourth proportional to 9,938.10, 13,712.64 and 6,400.80 is: 8,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,938.10 : 13,712.64 = 6,400.80 : x
  2. Step 2: Convert to fraction form
    9,938.10/13,712.64 = 6,400.80/x
  3. Step 3: Cross multiply
    9,938.10x = 13,712.64 × 6,400.80
  4. Step 4: Simplify right side
    9,938.10x = 87,771,866.11
  5. Step 5: Solve for x
    x = 87,771,866.11/9,938.10
  6. Step 6: Final answer
    x = 8,831.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.