Home / 18,393.16-25,385-13,690.84

Finding the Fourth Proportional to 18,393.16, 25,385 and 13,690.84

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Solution

The fourth proportional to 18,393.16, 25,385 and 13,690.84 is: 18,895.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,393.16 : 25,385 = 13,690.84 : x
  2. Step 2: Convert to fraction form
    18,393.16/25,385 = 13,690.84/x
  3. Step 3: Cross multiply
    18,393.16x = 25,385 × 13,690.84
  4. Step 4: Simplify right side
    18,393.16x = 347,541,973.40
  5. Step 5: Solve for x
    x = 347,541,973.40/18,393.16
  6. Step 6: Final answer
    x = 18,895.17

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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.