Home / 12,730.73-19,106.36-8,779.55

Finding the Fourth Proportional to 12,730.73, 19,106.36 and 8,779.55

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Solution

The fourth proportional to 12,730.73, 19,106.36 and 8,779.55 is: 13,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,730.73 : 19,106.36 = 8,779.55 : x
  2. Step 2: Convert to fraction form
    12,730.73/19,106.36 = 8,779.55/x
  3. Step 3: Cross multiply
    12,730.73x = 19,106.36 × 8,779.55
  4. Step 4: Simplify right side
    12,730.73x = 167,745,199.04
  5. Step 5: Solve for x
    x = 167,745,199.04/12,730.73
  6. Step 6: Final answer
    x = 13,176.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.