Home / 28,119.06-38,802.78-15,543

Finding the Fourth Proportional to 28,119.06, 38,802.78 and 15,543

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Solution

The fourth proportional to 28,119.06, 38,802.78 and 15,543 is: 21,448.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.06 : 38,802.78 = 15,543 : x
  2. Step 2: Convert to fraction form
    28,119.06/38,802.78 = 15,543/x
  3. Step 3: Cross multiply
    28,119.06x = 38,802.78 × 15,543
  4. Step 4: Simplify right side
    28,119.06x = 603,111,609.54
  5. Step 5: Solve for x
    x = 603,111,609.54/28,119.06
  6. Step 6: Final answer
    x = 21,448.50

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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.