Home / 27,980.35-38,612.82-15,405.10

Finding the Fourth Proportional to 27,980.35, 38,612.82 and 15,405.10

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Solution

The fourth proportional to 27,980.35, 38,612.82 and 15,405.10 is: 21,259.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980.35 : 38,612.82 = 15,405.10 : x
  2. Step 2: Convert to fraction form
    27,980.35/38,612.82 = 15,405.10/x
  3. Step 3: Cross multiply
    27,980.35x = 38,612.82 × 15,405.10
  4. Step 4: Simplify right side
    27,980.35x = 594,834,372.89
  5. Step 5: Solve for x
    x = 594,834,372.89/27,980.35
  6. Step 6: Final answer
    x = 21,259.00

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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.