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Finding the Fourth Proportional to 15,655, 21,603.90 and 9,034.84

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Solution

The fourth proportional to 15,655, 21,603.90 and 9,034.84 is: 12,468.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,655 : 21,603.90 = 9,034.84 : x
  2. Step 2: Convert to fraction form
    15,655/21,603.90 = 9,034.84/x
  3. Step 3: Cross multiply
    15,655x = 21,603.90 × 9,034.84
  4. Step 4: Simplify right side
    15,655x = 195,187,779.88
  5. Step 5: Solve for x
    x = 195,187,779.88/15,655
  6. Step 6: Final answer
    x = 12,468.08

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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.