Home / 13,490.10-18,615.63-7,521.65

Finding the Fourth Proportional to 13,490.10, 18,615.63 and 7,521.65

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Solution

The fourth proportional to 13,490.10, 18,615.63 and 7,521.65 is: 10,379.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.10 : 18,615.63 = 7,521.65 : x
  2. Step 2: Convert to fraction form
    13,490.10/18,615.63 = 7,521.65/x
  3. Step 3: Cross multiply
    13,490.10x = 18,615.63 × 7,521.65
  4. Step 4: Simplify right side
    13,490.10x = 140,020,160.31
  5. Step 5: Solve for x
    x = 140,020,160.31/13,490.10
  6. Step 6: Final answer
    x = 10,379.48

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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.