Home / 15,457.29-21,315-13,226.55

Finding the Fourth Proportional to 15,457.29, 21,315 and 13,226.55

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Solution

The fourth proportional to 15,457.29, 21,315 and 13,226.55 is: 18,238.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,457.29 : 21,315 = 13,226.55 : x
  2. Step 2: Convert to fraction form
    15,457.29/21,315 = 13,226.55/x
  3. Step 3: Cross multiply
    15,457.29x = 21,315 × 13,226.55
  4. Step 4: Simplify right side
    15,457.29x = 281,923,913.25
  5. Step 5: Solve for x
    x = 281,923,913.25/15,457.29
  6. Step 6: Final answer
    x = 18,238.90

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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.