Home / 15,389.01-21,236.76-8,315.41

Finding the Fourth Proportional to 15,389.01, 21,236.76 and 8,315.41

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Solution

The fourth proportional to 15,389.01, 21,236.76 and 8,315.41 is: 11,475.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.01 : 21,236.76 = 8,315.41 : x
  2. Step 2: Convert to fraction form
    15,389.01/21,236.76 = 8,315.41/x
  3. Step 3: Cross multiply
    15,389.01x = 21,236.76 × 8,315.41
  4. Step 4: Simplify right side
    15,389.01x = 176,592,366.47
  5. Step 5: Solve for x
    x = 176,592,366.47/15,389.01
  6. Step 6: Final answer
    x = 11,475.23

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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.