Home / 13,506.88-18,624.80-8,782.40

Finding the Fourth Proportional to 13,506.88, 18,624.80 and 8,782.40

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Solution

The fourth proportional to 13,506.88, 18,624.80 and 8,782.40 is: 12,110.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,506.88 : 18,624.80 = 8,782.40 : x
  2. Step 2: Convert to fraction form
    13,506.88/18,624.80 = 8,782.40/x
  3. Step 3: Cross multiply
    13,506.88x = 18,624.80 × 8,782.40
  4. Step 4: Simplify right side
    13,506.88x = 163,570,443.52
  5. Step 5: Solve for x
    x = 163,570,443.52/13,506.88
  6. Step 6: Final answer
    x = 12,110.16

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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.