Home / 12,416.78-17,123.54-9,579.68

Finding the Fourth Proportional to 12,416.78, 17,123.54 and 9,579.68

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Solution

The fourth proportional to 12,416.78, 17,123.54 and 9,579.68 is: 13,211.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,416.78 : 17,123.54 = 9,579.68 : x
  2. Step 2: Convert to fraction form
    12,416.78/17,123.54 = 9,579.68/x
  3. Step 3: Cross multiply
    12,416.78x = 17,123.54 × 9,579.68
  4. Step 4: Simplify right side
    12,416.78x = 164,038,033.67
  5. Step 5: Solve for x
    x = 164,038,033.67/12,416.78
  6. Step 6: Final answer
    x = 13,211.00

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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.