Home / 9,121.34-12,588.40-5,586.90

Finding the Fourth Proportional to 9,121.34, 12,588.40 and 5,586.90

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Solution

The fourth proportional to 9,121.34, 12,588.40 and 5,586.90 is: 7,710.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.34 : 12,588.40 = 5,586.90 : x
  2. Step 2: Convert to fraction form
    9,121.34/12,588.40 = 5,586.90/x
  3. Step 3: Cross multiply
    9,121.34x = 12,588.40 × 5,586.90
  4. Step 4: Simplify right side
    9,121.34x = 70,330,131.96
  5. Step 5: Solve for x
    x = 70,330,131.96/9,121.34
  6. Step 6: Final answer
    x = 7,710.50

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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.