Home / 28,612.12-39,485.99-15,864.49

Finding the Fourth Proportional to 28,612.12, 39,485.99 and 15,864.49

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Solution

The fourth proportional to 28,612.12, 39,485.99 and 15,864.49 is: 21,893.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.12 : 39,485.99 = 15,864.49 : x
  2. Step 2: Convert to fraction form
    28,612.12/39,485.99 = 15,864.49/x
  3. Step 3: Cross multiply
    28,612.12x = 39,485.99 × 15,864.49
  4. Step 4: Simplify right side
    28,612.12x = 626,425,014.17
  5. Step 5: Solve for x
    x = 626,425,014.17/28,612.12
  6. Step 6: Final answer
    x = 21,893.69

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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.