Home / 15,688.60-21,650.42-8,615.17

Finding the Fourth Proportional to 15,688.60, 21,650.42 and 8,615.17

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Solution

The fourth proportional to 15,688.60, 21,650.42 and 8,615.17 is: 11,889.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.60 : 21,650.42 = 8,615.17 : x
  2. Step 2: Convert to fraction form
    15,688.60/21,650.42 = 8,615.17/x
  3. Step 3: Cross multiply
    15,688.60x = 21,650.42 × 8,615.17
  4. Step 4: Simplify right side
    15,688.60x = 186,521,951.67
  5. Step 5: Solve for x
    x = 186,521,951.67/15,688.60
  6. Step 6: Final answer
    x = 11,889.01

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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.