Home / 28,005.03-38,647.40-15,429.78

Finding the Fourth Proportional to 28,005.03, 38,647.40 and 15,429.78

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Solution

The fourth proportional to 28,005.03, 38,647.40 and 15,429.78 is: 21,293.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.03 : 38,647.40 = 15,429.78 : x
  2. Step 2: Convert to fraction form
    28,005.03/38,647.40 = 15,429.78/x
  3. Step 3: Cross multiply
    28,005.03x = 38,647.40 × 15,429.78
  4. Step 4: Simplify right side
    28,005.03x = 596,320,802.42
  5. Step 5: Solve for x
    x = 596,320,802.42/28,005.03
  6. Step 6: Final answer
    x = 21,293.35

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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.