Home / 7,420.16-10,240-4,108.16

Finding the Fourth Proportional to 7,420.16, 10,240 and 4,108.16

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Solution

The fourth proportional to 7,420.16, 10,240 and 4,108.16 is: 5,669.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.16 : 10,240 = 4,108.16 : x
  2. Step 2: Convert to fraction form
    7,420.16/10,240 = 4,108.16/x
  3. Step 3: Cross multiply
    7,420.16x = 10,240 × 4,108.16
  4. Step 4: Simplify right side
    7,420.16x = 42,067,558.40
  5. Step 5: Solve for x
    x = 42,067,558.40/7,420.16
  6. Step 6: Final answer
    x = 5,669.36

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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.