Home / 28,005.61-38,647.72-15,430.36

Finding the Fourth Proportional to 28,005.61, 38,647.72 and 15,430.36

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Solution

The fourth proportional to 28,005.61, 38,647.72 and 15,430.36 is: 21,293.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.61 : 38,647.72 = 15,430.36 : x
  2. Step 2: Convert to fraction form
    28,005.61/38,647.72 = 15,430.36/x
  3. Step 3: Cross multiply
    28,005.61x = 38,647.72 × 15,430.36
  4. Step 4: Simplify right side
    28,005.61x = 596,348,232.78
  5. Step 5: Solve for x
    x = 596,348,232.78/28,005.61
  6. Step 6: Final answer
    x = 21,293.88

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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.