Home / 15,498.10-21,385.78-8,784.32

Finding the Fourth Proportional to 15,498.10, 21,385.78 and 8,784.32

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Solution

The fourth proportional to 15,498.10, 21,385.78 and 8,784.32 is: 12,121.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,498.10 : 21,385.78 = 8,784.32 : x
  2. Step 2: Convert to fraction form
    15,498.10/21,385.78 = 8,784.32/x
  3. Step 3: Cross multiply
    15,498.10x = 21,385.78 × 8,784.32
  4. Step 4: Simplify right side
    15,498.10x = 187,859,406.08
  5. Step 5: Solve for x
    x = 187,859,406.08/15,498.10
  6. Step 6: Final answer
    x = 12,121.45

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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.