Home / 8,715.60-12,030.28-5,571.80

Finding the Fourth Proportional to 8,715.60, 12,030.28 and 5,571.80

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Solution

The fourth proportional to 8,715.60, 12,030.28 and 5,571.80 is: 7,690.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.60 : 12,030.28 = 5,571.80 : x
  2. Step 2: Convert to fraction form
    8,715.60/12,030.28 = 5,571.80/x
  3. Step 3: Cross multiply
    8,715.60x = 12,030.28 × 5,571.80
  4. Step 4: Simplify right side
    8,715.60x = 67,030,314.10
  5. Step 5: Solve for x
    x = 67,030,314.10/8,715.60
  6. Step 6: Final answer
    x = 7,690.84

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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.