Home / 7,965.40-10,991.64-4,428.04

Finding the Fourth Proportional to 7,965.40, 10,991.64 and 4,428.04

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Solution

The fourth proportional to 7,965.40, 10,991.64 and 4,428.04 is: 6,110.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.40 : 10,991.64 = 4,428.04 : x
  2. Step 2: Convert to fraction form
    7,965.40/10,991.64 = 4,428.04/x
  3. Step 3: Cross multiply
    7,965.40x = 10,991.64 × 4,428.04
  4. Step 4: Simplify right side
    7,965.40x = 48,671,421.59
  5. Step 5: Solve for x
    x = 48,671,421.59/7,965.40
  6. Step 6: Final answer
    x = 6,110.35

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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.