Home / 20,721.84-28,595.28-11,769.32

Finding the Fourth Proportional to 20,721.84, 28,595.28 and 11,769.32

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Solution

The fourth proportional to 20,721.84, 28,595.28 and 11,769.32 is: 16,241.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.84 : 28,595.28 = 11,769.32 : x
  2. Step 2: Convert to fraction form
    20,721.84/28,595.28 = 11,769.32/x
  3. Step 3: Cross multiply
    20,721.84x = 28,595.28 × 11,769.32
  4. Step 4: Simplify right side
    20,721.84x = 336,547,000.81
  5. Step 5: Solve for x
    x = 336,547,000.81/20,721.84
  6. Step 6: Final answer
    x = 16,241.17

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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.