Home / 15,369.36-21,209.44-8,655

Finding the Fourth Proportional to 15,369.36, 21,209.44 and 8,655

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Solution

The fourth proportional to 15,369.36, 21,209.44 and 8,655 is: 11,943.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.36 : 21,209.44 = 8,655 : x
  2. Step 2: Convert to fraction form
    15,369.36/21,209.44 = 8,655/x
  3. Step 3: Cross multiply
    15,369.36x = 21,209.44 × 8,655
  4. Step 4: Simplify right side
    15,369.36x = 183,567,703.20
  5. Step 5: Solve for x
    x = 183,567,703.20/15,369.36
  6. Step 6: Final answer
    x = 11,943.74

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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.