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Finding the Fourth Proportional to 7,155, 9,873.90 and 4,011.19

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Solution

The fourth proportional to 7,155, 9,873.90 and 4,011.19 is: 5,535.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155 : 9,873.90 = 4,011.19 : x
  2. Step 2: Convert to fraction form
    7,155/9,873.90 = 4,011.19/x
  3. Step 3: Cross multiply
    7,155x = 9,873.90 × 4,011.19
  4. Step 4: Simplify right side
    7,155x = 39,606,064.26
  5. Step 5: Solve for x
    x = 39,606,064.26/7,155
  6. Step 6: Final answer
    x = 5,535.44

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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.