Home / 15,643.78-21,588.60-8,570.50

Finding the Fourth Proportional to 15,643.78, 21,588.60 and 8,570.50

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Solution

The fourth proportional to 15,643.78, 21,588.60 and 8,570.50 is: 11,827.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.78 : 21,588.60 = 8,570.50 : x
  2. Step 2: Convert to fraction form
    15,643.78/21,588.60 = 8,570.50/x
  3. Step 3: Cross multiply
    15,643.78x = 21,588.60 × 8,570.50
  4. Step 4: Simplify right side
    15,643.78x = 185,025,096.30
  5. Step 5: Solve for x
    x = 185,025,096.30/15,643.78
  6. Step 6: Final answer
    x = 11,827.39

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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.