Home / 15,711.95-21,683.73-8,999.69

Finding the Fourth Proportional to 15,711.95, 21,683.73 and 8,999.69

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Solution

The fourth proportional to 15,711.95, 21,683.73 and 8,999.69 is: 12,420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.95 : 21,683.73 = 8,999.69 : x
  2. Step 2: Convert to fraction form
    15,711.95/21,683.73 = 8,999.69/x
  3. Step 3: Cross multiply
    15,711.95x = 21,683.73 × 8,999.69
  4. Step 4: Simplify right side
    15,711.95x = 195,146,739.63
  5. Step 5: Solve for x
    x = 195,146,739.63/15,711.95
  6. Step 6: Final answer
    x = 12,420.28

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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.