Home / 15,490.54-21,376.47-8,416.81

Finding the Fourth Proportional to 15,490.54, 21,376.47 and 8,416.81

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Solution

The fourth proportional to 15,490.54, 21,376.47 and 8,416.81 is: 11,614.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.54 : 21,376.47 = 8,416.81 : x
  2. Step 2: Convert to fraction form
    15,490.54/21,376.47 = 8,416.81/x
  3. Step 3: Cross multiply
    15,490.54x = 21,376.47 × 8,416.81
  4. Step 4: Simplify right side
    15,490.54x = 179,921,686.46
  5. Step 5: Solve for x
    x = 179,921,686.46/15,490.54
  6. Step 6: Final answer
    x = 11,614.94

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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.