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Finding the Fourth Proportional to 15,803.78, 21,808.62 and 8,730.02

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Solution

The fourth proportional to 15,803.78, 21,808.62 and 8,730.02 is: 12,047.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.78 : 21,808.62 = 8,730.02 : x
  2. Step 2: Convert to fraction form
    15,803.78/21,808.62 = 8,730.02/x
  3. Step 3: Cross multiply
    15,803.78x = 21,808.62 × 8,730.02
  4. Step 4: Simplify right side
    15,803.78x = 190,389,688.77
  5. Step 5: Solve for x
    x = 190,389,688.77/15,803.78
  6. Step 6: Final answer
    x = 12,047.10

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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.