Home / 15,136.04-20,887.45-8,421.65

Finding the Fourth Proportional to 15,136.04, 20,887.45 and 8,421.65

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Solution

The fourth proportional to 15,136.04, 20,887.45 and 8,421.65 is: 11,621.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.04 : 20,887.45 = 8,421.65 : x
  2. Step 2: Convert to fraction form
    15,136.04/20,887.45 = 8,421.65/x
  3. Step 3: Cross multiply
    15,136.04x = 20,887.45 × 8,421.65
  4. Step 4: Simplify right side
    15,136.04x = 175,906,746.13
  5. Step 5: Solve for x
    x = 175,906,746.13/15,136.04
  6. Step 6: Final answer
    x = 11,621.71

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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.