Home / 15,477.65-21,310.59-13,658.80

Finding the Fourth Proportional to 15,477.65, 21,310.59 and 13,658.80

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Solution

The fourth proportional to 15,477.65, 21,310.59 and 13,658.80 is: 18,806.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,477.65 : 21,310.59 = 13,658.80 : x
  2. Step 2: Convert to fraction form
    15,477.65/21,310.59 = 13,658.80/x
  3. Step 3: Cross multiply
    15,477.65x = 21,310.59 × 13,658.80
  4. Step 4: Simplify right side
    15,477.65x = 291,077,086.69
  5. Step 5: Solve for x
    x = 291,077,086.69/15,477.65
  6. Step 6: Final answer
    x = 18,806.28

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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.