Home / 7,039.36-9,709.50-4,385.80

Finding the Fourth Proportional to 7,039.36, 9,709.50 and 4,385.80

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Solution

The fourth proportional to 7,039.36, 9,709.50 and 4,385.80 is: 6,049.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,039.36 : 9,709.50 = 4,385.80 : x
  2. Step 2: Convert to fraction form
    7,039.36/9,709.50 = 4,385.80/x
  3. Step 3: Cross multiply
    7,039.36x = 9,709.50 × 4,385.80
  4. Step 4: Simplify right side
    7,039.36x = 42,583,925.10
  5. Step 5: Solve for x
    x = 42,583,925.10/7,039.36
  6. Step 6: Final answer
    x = 6,049.40

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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.