Home / 15,003.12-20,703.96-8,288.40

Finding the Fourth Proportional to 15,003.12, 20,703.96 and 8,288.40

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Solution

The fourth proportional to 15,003.12, 20,703.96 and 8,288.40 is: 11,437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,003.12 : 20,703.96 = 8,288.40 : x
  2. Step 2: Convert to fraction form
    15,003.12/20,703.96 = 8,288.40/x
  3. Step 3: Cross multiply
    15,003.12x = 20,703.96 × 8,288.40
  4. Step 4: Simplify right side
    15,003.12x = 171,602,702.06
  5. Step 5: Solve for x
    x = 171,602,702.06/15,003.12
  6. Step 6: Final answer
    x = 11,437.80

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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.