Home / 15,913.36-21,887.40-12,762.64

Finding the Fourth Proportional to 15,913.36, 21,887.40 and 12,762.64

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Solution

The fourth proportional to 15,913.36, 21,887.40 and 12,762.64 is: 17,553.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,913.36 : 21,887.40 = 12,762.64 : x
  2. Step 2: Convert to fraction form
    15,913.36/21,887.40 = 12,762.64/x
  3. Step 3: Cross multiply
    15,913.36x = 21,887.40 × 12,762.64
  4. Step 4: Simplify right side
    15,913.36x = 279,341,006.74
  5. Step 5: Solve for x
    x = 279,341,006.74/15,913.36
  6. Step 6: Final answer
    x = 17,553.87

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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.