Home / 28,119.12-38,802.72-15,543.12

Finding the Fourth Proportional to 28,119.12, 38,802.72 and 15,543.12

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Solution

The fourth proportional to 28,119.12, 38,802.72 and 15,543.12 is: 21,448.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.12 : 38,802.72 = 15,543.12 : x
  2. Step 2: Convert to fraction form
    28,119.12/38,802.72 = 15,543.12/x
  3. Step 3: Cross multiply
    28,119.12x = 38,802.72 × 15,543.12
  4. Step 4: Simplify right side
    28,119.12x = 603,115,333.29
  5. Step 5: Solve for x
    x = 603,115,333.29/28,119.12
  6. Step 6: Final answer
    x = 21,448.58

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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.