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Finding the Fourth Proportional to 7,760.16, 10,709.40 and 4,574.40

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Solution

The fourth proportional to 7,760.16, 10,709.40 and 4,574.40 is: 6,312.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,760.16 : 10,709.40 = 4,574.40 : x
  2. Step 2: Convert to fraction form
    7,760.16/10,709.40 = 4,574.40/x
  3. Step 3: Cross multiply
    7,760.16x = 10,709.40 × 4,574.40
  4. Step 4: Simplify right side
    7,760.16x = 48,989,079.36
  5. Step 5: Solve for x
    x = 48,989,079.36/7,760.16
  6. Step 6: Final answer
    x = 6,312.90

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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.