Home / 15,661.12-21,605.08-13,870.44

Finding the Fourth Proportional to 15,661.12, 21,605.08 and 13,870.44

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Solution

The fourth proportional to 15,661.12, 21,605.08 and 13,870.44 is: 19,134.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.12 : 21,605.08 = 13,870.44 : x
  2. Step 2: Convert to fraction form
    15,661.12/21,605.08 = 13,870.44/x
  3. Step 3: Cross multiply
    15,661.12x = 21,605.08 × 13,870.44
  4. Step 4: Simplify right side
    15,661.12x = 299,671,965.84
  5. Step 5: Solve for x
    x = 299,671,965.84/15,661.12
  6. Step 6: Final answer
    x = 19,134.77

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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.