Home / 21,526.76-29,706.55-13,143.26

Finding the Fourth Proportional to 21,526.76, 29,706.55 and 13,143.26

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Solution

The fourth proportional to 21,526.76, 29,706.55 and 13,143.26 is: 18,137.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,526.76 : 29,706.55 = 13,143.26 : x
  2. Step 2: Convert to fraction form
    21,526.76/29,706.55 = 13,143.26/x
  3. Step 3: Cross multiply
    21,526.76x = 29,706.55 × 13,143.26
  4. Step 4: Simplify right side
    21,526.76x = 390,440,910.35
  5. Step 5: Solve for x
    x = 390,440,910.35/21,526.76
  6. Step 6: Final answer
    x = 18,137.47

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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.