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Finding the Fourth Proportional to 15,478.77, 21,360.48 and 8,764.22

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Solution

The fourth proportional to 15,478.77, 21,360.48 and 8,764.22 is: 12,094.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.77 : 21,360.48 = 8,764.22 : x
  2. Step 2: Convert to fraction form
    15,478.77/21,360.48 = 8,764.22/x
  3. Step 3: Cross multiply
    15,478.77x = 21,360.48 × 8,764.22
  4. Step 4: Simplify right side
    15,478.77x = 187,207,946.03
  5. Step 5: Solve for x
    x = 187,207,946.03/15,478.77
  6. Step 6: Final answer
    x = 12,094.50

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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.