Home / 15,762.31-21,752.94-8,688.70

Finding the Fourth Proportional to 15,762.31, 21,752.94 and 8,688.70

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Solution

The fourth proportional to 15,762.31, 21,752.94 and 8,688.70 is: 11,990.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,762.31 : 21,752.94 = 8,688.70 : x
  2. Step 2: Convert to fraction form
    15,762.31/21,752.94 = 8,688.70/x
  3. Step 3: Cross multiply
    15,762.31x = 21,752.94 × 8,688.70
  4. Step 4: Simplify right side
    15,762.31x = 189,004,769.78
  5. Step 5: Solve for x
    x = 189,004,769.78/15,762.31
  6. Step 6: Final answer
    x = 11,990.93

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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.