Home / 7,120.72-10,690.80-4,535.20

Finding the Fourth Proportional to 7,120.72, 10,690.80 and 4,535.20

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Solution

The fourth proportional to 7,120.72, 10,690.80 and 4,535.20 is: 6,808.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.72 : 10,690.80 = 4,535.20 : x
  2. Step 2: Convert to fraction form
    7,120.72/10,690.80 = 4,535.20/x
  3. Step 3: Cross multiply
    7,120.72x = 10,690.80 × 4,535.20
  4. Step 4: Simplify right side
    7,120.72x = 48,484,916.16
  5. Step 5: Solve for x
    x = 48,484,916.16/7,120.72
  6. Step 6: Final answer
    x = 6,808.99

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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.