Home / 15,588.90-21,512.63-8,515.32

Finding the Fourth Proportional to 15,588.90, 21,512.63 and 8,515.32

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Solution

The fourth proportional to 15,588.90, 21,512.63 and 8,515.32 is: 11,751.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,588.90 : 21,512.63 = 8,515.32 : x
  2. Step 2: Convert to fraction form
    15,588.90/21,512.63 = 8,515.32/x
  3. Step 3: Cross multiply
    15,588.90x = 21,512.63 × 8,515.32
  4. Step 4: Simplify right side
    15,588.90x = 183,186,928.49
  5. Step 5: Solve for x
    x = 183,186,928.49/15,588.90
  6. Step 6: Final answer
    x = 11,751.11

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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.