Home / 15,515.19-21,415.77-8,805.27

Finding the Fourth Proportional to 15,515.19, 21,415.77 and 8,805.27

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Solution

The fourth proportional to 15,515.19, 21,415.77 and 8,805.27 is: 12,154.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.19 : 21,415.77 = 8,805.27 : x
  2. Step 2: Convert to fraction form
    15,515.19/21,415.77 = 8,805.27/x
  3. Step 3: Cross multiply
    15,515.19x = 21,415.77 × 8,805.27
  4. Step 4: Simplify right side
    15,515.19x = 188,571,637.11
  5. Step 5: Solve for x
    x = 188,571,637.11/15,515.19
  6. Step 6: Final answer
    x = 12,154.00

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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.