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Finding the Fourth Proportional to 15,989, 22,064.90 and 8,721.04

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Solution

The fourth proportional to 15,989, 22,064.90 and 8,721.04 is: 12,035.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,989 : 22,064.90 = 8,721.04 : x
  2. Step 2: Convert to fraction form
    15,989/22,064.90 = 8,721.04/x
  3. Step 3: Cross multiply
    15,989x = 22,064.90 × 8,721.04
  4. Step 4: Simplify right side
    15,989x = 192,428,875.50
  5. Step 5: Solve for x
    x = 192,428,875.50/15,989
  6. Step 6: Final answer
    x = 12,035.08

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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.