Home / 28,145.55-38,840.32-15,570.30

Finding the Fourth Proportional to 28,145.55, 38,840.32 and 15,570.30

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Solution

The fourth proportional to 28,145.55, 38,840.32 and 15,570.30 is: 21,486.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.55 : 38,840.32 = 15,570.30 : x
  2. Step 2: Convert to fraction form
    28,145.55/38,840.32 = 15,570.30/x
  3. Step 3: Cross multiply
    28,145.55x = 38,840.32 × 15,570.30
  4. Step 4: Simplify right side
    28,145.55x = 604,755,434.50
  5. Step 5: Solve for x
    x = 604,755,434.50/28,145.55
  6. Step 6: Final answer
    x = 21,486.72

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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.