Home / 15,497.21-21,386.78-8,782.76

Finding the Fourth Proportional to 15,497.21, 21,386.78 and 8,782.76

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Solution

The fourth proportional to 15,497.21, 21,386.78 and 8,782.76 is: 12,120.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,497.21 : 21,386.78 = 8,782.76 : x
  2. Step 2: Convert to fraction form
    15,497.21/21,386.78 = 8,782.76/x
  3. Step 3: Cross multiply
    15,497.21x = 21,386.78 × 8,782.76
  4. Step 4: Simplify right side
    15,497.21x = 187,834,955.91
  5. Step 5: Solve for x
    x = 187,834,955.91/15,497.21
  6. Step 6: Final answer
    x = 12,120.57

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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.