Home / 15,485.31-21,378.59-10,195.50

Finding the Fourth Proportional to 15,485.31, 21,378.59 and 10,195.50

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Solution

The fourth proportional to 15,485.31, 21,378.59 and 10,195.50 is: 14,075.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.31 : 21,378.59 = 10,195.50 : x
  2. Step 2: Convert to fraction form
    15,485.31/21,378.59 = 10,195.50/x
  3. Step 3: Cross multiply
    15,485.31x = 21,378.59 × 10,195.50
  4. Step 4: Simplify right side
    15,485.31x = 217,965,414.35
  5. Step 5: Solve for x
    x = 217,965,414.35/15,485.31
  6. Step 6: Final answer
    x = 14,075.63

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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.