Home / 28,312.40-39,113.48-18,644.83

Finding the Fourth Proportional to 28,312.40, 39,113.48 and 18,644.83

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Solution

The fourth proportional to 28,312.40, 39,113.48 and 18,644.83 is: 25,757.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.40 : 39,113.48 = 18,644.83 : x
  2. Step 2: Convert to fraction form
    28,312.40/39,113.48 = 18,644.83/x
  3. Step 3: Cross multiply
    28,312.40x = 39,113.48 × 18,644.83
  4. Step 4: Simplify right side
    28,312.40x = 729,264,185.31
  5. Step 5: Solve for x
    x = 729,264,185.31/28,312.40
  6. Step 6: Final answer
    x = 25,757.77

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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.