Home / 15,389.50-21,237.45-8,315.91

Finding the Fourth Proportional to 15,389.50, 21,237.45 and 8,315.91

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Solution

The fourth proportional to 15,389.50, 21,237.45 and 8,315.91 is: 11,475.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.50 : 21,237.45 = 8,315.91 : x
  2. Step 2: Convert to fraction form
    15,389.50/21,237.45 = 8,315.91/x
  3. Step 3: Cross multiply
    15,389.50x = 21,237.45 × 8,315.91
  4. Step 4: Simplify right side
    15,389.50x = 176,608,722.83
  5. Step 5: Solve for x
    x = 176,608,722.83/15,389.50
  6. Step 6: Final answer
    x = 11,475.92

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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.