Home / 20,666.31-28,521.74-11,712.86

Finding the Fourth Proportional to 20,666.31, 28,521.74 and 11,712.86

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Solution

The fourth proportional to 20,666.31, 28,521.74 and 11,712.86 is: 16,165.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.31 : 28,521.74 = 11,712.86 : x
  2. Step 2: Convert to fraction form
    20,666.31/28,521.74 = 11,712.86/x
  3. Step 3: Cross multiply
    20,666.31x = 28,521.74 × 11,712.86
  4. Step 4: Simplify right side
    20,666.31x = 334,071,035.37
  5. Step 5: Solve for x
    x = 334,071,035.37/20,666.31
  6. Step 6: Final answer
    x = 16,165.00

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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.