Home / 21,459.72-29,601.21-13,495.40

Finding the Fourth Proportional to 21,459.72, 29,601.21 and 13,495.40

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Solution

The fourth proportional to 21,459.72, 29,601.21 and 13,495.40 is: 18,615.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.72 : 29,601.21 = 13,495.40 : x
  2. Step 2: Convert to fraction form
    21,459.72/29,601.21 = 13,495.40/x
  3. Step 3: Cross multiply
    21,459.72x = 29,601.21 × 13,495.40
  4. Step 4: Simplify right side
    21,459.72x = 399,480,169.43
  5. Step 5: Solve for x
    x = 399,480,169.43/21,459.72
  6. Step 6: Final answer
    x = 18,615.35

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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.