Home / 8,681.40-11,977.36-5,655.12

Finding the Fourth Proportional to 8,681.40, 11,977.36 and 5,655.12

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Solution

The fourth proportional to 8,681.40, 11,977.36 and 5,655.12 is: 7,802.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.40 : 11,977.36 = 5,655.12 : x
  2. Step 2: Convert to fraction form
    8,681.40/11,977.36 = 5,655.12/x
  3. Step 3: Cross multiply
    8,681.40x = 11,977.36 × 5,655.12
  4. Step 4: Simplify right side
    8,681.40x = 67,733,408.08
  5. Step 5: Solve for x
    x = 67,733,408.08/8,681.40
  6. Step 6: Final answer
    x = 7,802.13

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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.