Home / 13,705.76-20,548.38-12,315.08

Finding the Fourth Proportional to 13,705.76, 20,548.38 and 12,315.08

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Solution

The fourth proportional to 13,705.76, 20,548.38 and 12,315.08 is: 18,463.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705.76 : 20,548.38 = 12,315.08 : x
  2. Step 2: Convert to fraction form
    13,705.76/20,548.38 = 12,315.08/x
  3. Step 3: Cross multiply
    13,705.76x = 20,548.38 × 12,315.08
  4. Step 4: Simplify right side
    13,705.76x = 253,054,943.57
  5. Step 5: Solve for x
    x = 253,054,943.57/13,705.76
  6. Step 6: Final answer
    x = 18,463.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.