Home / 15,507.65-21,400.13-8,434.37

Finding the Fourth Proportional to 15,507.65, 21,400.13 and 8,434.37

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Solution

The fourth proportional to 15,507.65, 21,400.13 and 8,434.37 is: 11,639.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,507.65 : 21,400.13 = 8,434.37 : x
  2. Step 2: Convert to fraction form
    15,507.65/21,400.13 = 8,434.37/x
  3. Step 3: Cross multiply
    15,507.65x = 21,400.13 × 8,434.37
  4. Step 4: Simplify right side
    15,507.65x = 180,496,572.30
  5. Step 5: Solve for x
    x = 180,496,572.30/15,507.65
  6. Step 6: Final answer
    x = 11,639.20

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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.