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Finding the Fourth Proportional to 15,539.58, 21,444.21 and 8,465.58

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Solution

The fourth proportional to 15,539.58, 21,444.21 and 8,465.58 is: 11,682.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,539.58 : 21,444.21 = 8,465.58 : x
  2. Step 2: Convert to fraction form
    15,539.58/21,444.21 = 8,465.58/x
  3. Step 3: Cross multiply
    15,539.58x = 21,444.21 × 8,465.58
  4. Step 4: Simplify right side
    15,539.58x = 181,537,675.29
  5. Step 5: Solve for x
    x = 181,537,675.29/15,539.58
  6. Step 6: Final answer
    x = 11,682.28

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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.