Home / 9,920.34-13,699.23-6,389.70

Finding the Fourth Proportional to 9,920.34, 13,699.23 and 6,389.70

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Solution

The fourth proportional to 9,920.34, 13,699.23 and 6,389.70 is: 8,823.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.34 : 13,699.23 = 6,389.70 : x
  2. Step 2: Convert to fraction form
    9,920.34/13,699.23 = 6,389.70/x
  3. Step 3: Cross multiply
    9,920.34x = 13,699.23 × 6,389.70
  4. Step 4: Simplify right side
    9,920.34x = 87,533,969.93
  5. Step 5: Solve for x
    x = 87,533,969.93/9,920.34
  6. Step 6: Final answer
    x = 8,823.69

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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.