Home / 20,929.25-28,886.60-12,859.22

Finding the Fourth Proportional to 20,929.25, 28,886.60 and 12,859.22

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Solution

The fourth proportional to 20,929.25, 28,886.60 and 12,859.22 is: 17,748.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.25 : 28,886.60 = 12,859.22 : x
  2. Step 2: Convert to fraction form
    20,929.25/28,886.60 = 12,859.22/x
  3. Step 3: Cross multiply
    20,929.25x = 28,886.60 × 12,859.22
  4. Step 4: Simplify right side
    20,929.25x = 371,459,032.17
  5. Step 5: Solve for x
    x = 371,459,032.17/20,929.25
  6. Step 6: Final answer
    x = 17,748.32

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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.