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Finding the Fourth Proportional to 15,803.49, 21,810.51 and 9,090.30

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Solution

The fourth proportional to 15,803.49, 21,810.51 and 9,090.30 is: 12,545.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.49 : 21,810.51 = 9,090.30 : x
  2. Step 2: Convert to fraction form
    15,803.49/21,810.51 = 9,090.30/x
  3. Step 3: Cross multiply
    15,803.49x = 21,810.51 × 9,090.30
  4. Step 4: Simplify right side
    15,803.49x = 198,264,079.05
  5. Step 5: Solve for x
    x = 198,264,079.05/15,803.49
  6. Step 6: Final answer
    x = 12,545.59

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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.