Home / 13,215.16-18,255.90-10,559.08

Finding the Fourth Proportional to 13,215.16, 18,255.90 and 10,559.08

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Solution

The fourth proportional to 13,215.16, 18,255.90 and 10,559.08 is: 14,586.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.16 : 18,255.90 = 10,559.08 : x
  2. Step 2: Convert to fraction form
    13,215.16/18,255.90 = 10,559.08/x
  3. Step 3: Cross multiply
    13,215.16x = 18,255.90 × 10,559.08
  4. Step 4: Simplify right side
    13,215.16x = 192,765,508.57
  5. Step 5: Solve for x
    x = 192,765,508.57/13,215.16
  6. Step 6: Final answer
    x = 14,586.70

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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.