Home / 15,321.15-21,143.70-10,012.95

Finding the Fourth Proportional to 15,321.15, 21,143.70 and 10,012.95

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Solution

The fourth proportional to 15,321.15, 21,143.70 and 10,012.95 is: 13,818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.15 : 21,143.70 = 10,012.95 : x
  2. Step 2: Convert to fraction form
    15,321.15/21,143.70 = 10,012.95/x
  3. Step 3: Cross multiply
    15,321.15x = 21,143.70 × 10,012.95
  4. Step 4: Simplify right side
    15,321.15x = 211,710,810.92
  5. Step 5: Solve for x
    x = 211,710,810.92/15,321.15
  6. Step 6: Final answer
    x = 13,818.21

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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.