Home / 15,485.05-21,369.36-8,411.47

Finding the Fourth Proportional to 15,485.05, 21,369.36 and 8,411.47

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Solution

The fourth proportional to 15,485.05, 21,369.36 and 8,411.47 is: 11,607.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.05 : 21,369.36 = 8,411.47 : x
  2. Step 2: Convert to fraction form
    15,485.05/21,369.36 = 8,411.47/x
  3. Step 3: Cross multiply
    15,485.05x = 21,369.36 × 8,411.47
  4. Step 4: Simplify right side
    15,485.05x = 179,747,623.71
  5. Step 5: Solve for x
    x = 179,747,623.71/15,485.05
  6. Step 6: Final answer
    x = 11,607.82

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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.