Home / 15,455.58-21,319.10-13,565.64

Finding the Fourth Proportional to 15,455.58, 21,319.10 and 13,565.64

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Solution

The fourth proportional to 15,455.58, 21,319.10 and 13,565.64 is: 18,712.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.58 : 21,319.10 = 13,565.64 : x
  2. Step 2: Convert to fraction form
    15,455.58/21,319.10 = 13,565.64/x
  3. Step 3: Cross multiply
    15,455.58x = 21,319.10 × 13,565.64
  4. Step 4: Simplify right side
    15,455.58x = 289,207,167.90
  5. Step 5: Solve for x
    x = 289,207,167.90/15,455.58
  6. Step 6: Final answer
    x = 18,712.15

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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.