Home / 20,799.91-31,154.67-12,904.36

Finding the Fourth Proportional to 20,799.91, 31,154.67 and 12,904.36

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Solution

The fourth proportional to 20,799.91, 31,154.67 and 12,904.36 is: 19,328.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.91 : 31,154.67 = 12,904.36 : x
  2. Step 2: Convert to fraction form
    20,799.91/31,154.67 = 12,904.36/x
  3. Step 3: Cross multiply
    20,799.91x = 31,154.67 × 12,904.36
  4. Step 4: Simplify right side
    20,799.91x = 402,031,077.36
  5. Step 5: Solve for x
    x = 402,031,077.36/20,799.91
  6. Step 6: Final answer
    x = 19,328.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.