Home / 13,416.48-18,515.88-7,448.40

Finding the Fourth Proportional to 13,416.48, 18,515.88 and 7,448.40

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Solution

The fourth proportional to 13,416.48, 18,515.88 and 7,448.40 is: 10,279.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.48 : 18,515.88 = 7,448.40 : x
  2. Step 2: Convert to fraction form
    13,416.48/18,515.88 = 7,448.40/x
  3. Step 3: Cross multiply
    13,416.48x = 18,515.88 × 7,448.40
  4. Step 4: Simplify right side
    13,416.48x = 137,913,680.59
  5. Step 5: Solve for x
    x = 137,913,680.59/13,416.48
  6. Step 6: Final answer
    x = 10,279.42

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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.