Home / 15,746.10-21,711.40-12,556.90

Finding the Fourth Proportional to 15,746.10, 21,711.40 and 12,556.90

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Solution

The fourth proportional to 15,746.10, 21,711.40 and 12,556.90 is: 17,313.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,746.10 : 21,711.40 = 12,556.90 : x
  2. Step 2: Convert to fraction form
    15,746.10/21,711.40 = 12,556.90/x
  3. Step 3: Cross multiply
    15,746.10x = 21,711.40 × 12,556.90
  4. Step 4: Simplify right side
    15,746.10x = 272,627,878.66
  5. Step 5: Solve for x
    x = 272,627,878.66/15,746.10
  6. Step 6: Final answer
    x = 17,313.99

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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.