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Finding the Fourth Proportional to 15,690.40, 23,648.40 and 13,525.28

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Solution

The fourth proportional to 15,690.40, 23,648.40 and 13,525.28 is: 20,385.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.40 : 23,648.40 = 13,525.28 : x
  2. Step 2: Convert to fraction form
    15,690.40/23,648.40 = 13,525.28/x
  3. Step 3: Cross multiply
    15,690.40x = 23,648.40 × 13,525.28
  4. Step 4: Simplify right side
    15,690.40x = 319,851,231.55
  5. Step 5: Solve for x
    x = 319,851,231.55/15,690.40
  6. Step 6: Final answer
    x = 20,385.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.