Home / 21,415.74-29,548.98-13,455.06

Finding the Fourth Proportional to 21,415.74, 29,548.98 and 13,455.06

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Solution

The fourth proportional to 21,415.74, 29,548.98 and 13,455.06 is: 18,565.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.74 : 29,548.98 = 13,455.06 : x
  2. Step 2: Convert to fraction form
    21,415.74/29,548.98 = 13,455.06/x
  3. Step 3: Cross multiply
    21,415.74x = 29,548.98 × 13,455.06
  4. Step 4: Simplify right side
    21,415.74x = 397,583,298.84
  5. Step 5: Solve for x
    x = 397,583,298.84/21,415.74
  6. Step 6: Final answer
    x = 18,565.00

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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.