Home / 20,929.16-28,869.44-12,425.51

Finding the Fourth Proportional to 20,929.16, 28,869.44 and 12,425.51

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Solution

The fourth proportional to 20,929.16, 28,869.44 and 12,425.51 is: 17,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.16 : 28,869.44 = 12,425.51 : x
  2. Step 2: Convert to fraction form
    20,929.16/28,869.44 = 12,425.51/x
  3. Step 3: Cross multiply
    20,929.16x = 28,869.44 × 12,425.51
  4. Step 4: Simplify right side
    20,929.16x = 358,717,308.94
  5. Step 5: Solve for x
    x = 358,717,308.94/20,929.16
  6. Step 6: Final answer
    x = 17,139.60

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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.