Home / 8,557.40-12,857.70-5,438.90

Finding the Fourth Proportional to 8,557.40, 12,857.70 and 5,438.90

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Solution

The fourth proportional to 8,557.40, 12,857.70 and 5,438.90 is: 8,172.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.40 : 12,857.70 = 5,438.90 : x
  2. Step 2: Convert to fraction form
    8,557.40/12,857.70 = 5,438.90/x
  3. Step 3: Cross multiply
    8,557.40x = 12,857.70 × 5,438.90
  4. Step 4: Simplify right side
    8,557.40x = 69,931,744.53
  5. Step 5: Solve for x
    x = 69,931,744.53/8,557.40
  6. Step 6: Final answer
    x = 8,172.08

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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.