Home / 15,328.74-21,153.64-8,959.71

Finding the Fourth Proportional to 15,328.74, 21,153.64 and 8,959.71

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Solution

The fourth proportional to 15,328.74, 21,153.64 and 8,959.71 is: 12,364.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,328.74 : 21,153.64 = 8,959.71 : x
  2. Step 2: Convert to fraction form
    15,328.74/21,153.64 = 8,959.71/x
  3. Step 3: Cross multiply
    15,328.74x = 21,153.64 × 8,959.71
  4. Step 4: Simplify right side
    15,328.74x = 189,530,479.84
  5. Step 5: Solve for x
    x = 189,530,479.84/15,328.74
  6. Step 6: Final answer
    x = 12,364.39

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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.