Home / 28,125.72-38,813.40-15,379.02

Finding the Fourth Proportional to 28,125.72, 38,813.40 and 15,379.02

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Solution

The fourth proportional to 28,125.72, 38,813.40 and 15,379.02 is: 21,223.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.72 : 38,813.40 = 15,379.02 : x
  2. Step 2: Convert to fraction form
    28,125.72/38,813.40 = 15,379.02/x
  3. Step 3: Cross multiply
    28,125.72x = 38,813.40 × 15,379.02
  4. Step 4: Simplify right side
    28,125.72x = 596,912,054.87
  5. Step 5: Solve for x
    x = 596,912,054.87/28,125.72
  6. Step 6: Final answer
    x = 21,223.00

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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.