Home / 15,730.50-21,708.78-8,656.77

Finding the Fourth Proportional to 15,730.50, 21,708.78 and 8,656.77

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Solution

The fourth proportional to 15,730.50, 21,708.78 and 8,656.77 is: 11,946.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.50 : 21,708.78 = 8,656.77 : x
  2. Step 2: Convert to fraction form
    15,730.50/21,708.78 = 8,656.77/x
  3. Step 3: Cross multiply
    15,730.50x = 21,708.78 × 8,656.77
  4. Step 4: Simplify right side
    15,730.50x = 187,927,915.44
  5. Step 5: Solve for x
    x = 187,927,915.44/15,730.50
  6. Step 6: Final answer
    x = 11,946.72

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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.