Home / 20,946.16-28,905.32-11,385.84

Finding the Fourth Proportional to 20,946.16, 28,905.32 and 11,385.84

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Solution

The fourth proportional to 20,946.16, 28,905.32 and 11,385.84 is: 15,712.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.16 : 28,905.32 = 11,385.84 : x
  2. Step 2: Convert to fraction form
    20,946.16/28,905.32 = 11,385.84/x
  3. Step 3: Cross multiply
    20,946.16x = 28,905.32 × 11,385.84
  4. Step 4: Simplify right side
    20,946.16x = 329,111,348.67
  5. Step 5: Solve for x
    x = 329,111,348.67/20,946.16
  6. Step 6: Final answer
    x = 15,712.25

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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.