Home / 9,389.85-12,957.87-5,140.86

Finding the Fourth Proportional to 9,389.85, 12,957.87 and 5,140.86

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Solution

The fourth proportional to 9,389.85, 12,957.87 and 5,140.86 is: 7,094.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,389.85 : 12,957.87 = 5,140.86 : x
  2. Step 2: Convert to fraction form
    9,389.85/12,957.87 = 5,140.86/x
  3. Step 3: Cross multiply
    9,389.85x = 12,957.87 × 5,140.86
  4. Step 4: Simplify right side
    9,389.85x = 66,614,595.57
  5. Step 5: Solve for x
    x = 66,614,595.57/9,389.85
  6. Step 6: Final answer
    x = 7,094.32

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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.