Home / 13,780.32-19,017.18-8,403.04

Finding the Fourth Proportional to 13,780.32, 19,017.18 and 8,403.04

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Solution

The fourth proportional to 13,780.32, 19,017.18 and 8,403.04 is: 11,596.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.32 : 19,017.18 = 8,403.04 : x
  2. Step 2: Convert to fraction form
    13,780.32/19,017.18 = 8,403.04/x
  3. Step 3: Cross multiply
    13,780.32x = 19,017.18 × 8,403.04
  4. Step 4: Simplify right side
    13,780.32x = 159,802,124.23
  5. Step 5: Solve for x
    x = 159,802,124.23/13,780.32
  6. Step 6: Final answer
    x = 11,596.40

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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.