Home / 15,345.90-21,171.78-10,040.40

Finding the Fourth Proportional to 15,345.90, 21,171.78 and 10,040.40

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Solution

The fourth proportional to 15,345.90, 21,171.78 and 10,040.40 is: 13,852.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.90 : 21,171.78 = 10,040.40 : x
  2. Step 2: Convert to fraction form
    15,345.90/21,171.78 = 10,040.40/x
  3. Step 3: Cross multiply
    15,345.90x = 21,171.78 × 10,040.40
  4. Step 4: Simplify right side
    15,345.90x = 212,573,139.91
  5. Step 5: Solve for x
    x = 212,573,139.91/15,345.90
  6. Step 6: Final answer
    x = 13,852.11

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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.