Home / 15,510.42-21,403.76-8,436.87

Finding the Fourth Proportional to 15,510.42, 21,403.76 and 8,436.87

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Solution

The fourth proportional to 15,510.42, 21,403.76 and 8,436.87 is: 11,642.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510.42 : 21,403.76 = 8,436.87 : x
  2. Step 2: Convert to fraction form
    15,510.42/21,403.76 = 8,436.87/x
  3. Step 3: Cross multiply
    15,510.42x = 21,403.76 × 8,436.87
  4. Step 4: Simplify right side
    15,510.42x = 180,580,698.45
  5. Step 5: Solve for x
    x = 180,580,698.45/15,510.42
  6. Step 6: Final answer
    x = 11,642.54

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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.