Home / 13,890.30-19,113.99-12,565.50

Finding the Fourth Proportional to 13,890.30, 19,113.99 and 12,565.50

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Solution

The fourth proportional to 13,890.30, 19,113.99 and 12,565.50 is: 17,290.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.30 : 19,113.99 = 12,565.50 : x
  2. Step 2: Convert to fraction form
    13,890.30/19,113.99 = 12,565.50/x
  3. Step 3: Cross multiply
    13,890.30x = 19,113.99 × 12,565.50
  4. Step 4: Simplify right side
    13,890.30x = 240,176,841.35
  5. Step 5: Solve for x
    x = 240,176,841.35/13,890.30
  6. Step 6: Final answer
    x = 17,290.98

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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.