Home / 15,153.04-20,909.78-8,779.87

Finding the Fourth Proportional to 15,153.04, 20,909.78 and 8,779.87

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Solution

The fourth proportional to 15,153.04, 20,909.78 and 8,779.87 is: 12,115.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.04 : 20,909.78 = 8,779.87 : x
  2. Step 2: Convert to fraction form
    15,153.04/20,909.78 = 8,779.87/x
  3. Step 3: Cross multiply
    15,153.04x = 20,909.78 × 8,779.87
  4. Step 4: Simplify right side
    15,153.04x = 183,585,132.37
  5. Step 5: Solve for x
    x = 183,585,132.37/15,153.04
  6. Step 6: Final answer
    x = 12,115.40

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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.