Home / 28,005.16-38,647.38-15,430.12

Finding the Fourth Proportional to 28,005.16, 38,647.38 and 15,430.12

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Solution

The fourth proportional to 28,005.16, 38,647.38 and 15,430.12 is: 21,293.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.16 : 38,647.38 = 15,430.12 : x
  2. Step 2: Convert to fraction form
    28,005.16/38,647.38 = 15,430.12/x
  3. Step 3: Cross multiply
    28,005.16x = 38,647.38 × 15,430.12
  4. Step 4: Simplify right side
    28,005.16x = 596,333,711.09
  5. Step 5: Solve for x
    x = 596,333,711.09/28,005.16
  6. Step 6: Final answer
    x = 21,293.71

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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.