Home / 21,307.60-29,405-11,875.92

Finding the Fourth Proportional to 21,307.60, 29,405 and 11,875.92

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Solution

The fourth proportional to 21,307.60, 29,405 and 11,875.92 is: 16,389.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.60 : 29,405 = 11,875.92 : x
  2. Step 2: Convert to fraction form
    21,307.60/29,405 = 11,875.92/x
  3. Step 3: Cross multiply
    21,307.60x = 29,405 × 11,875.92
  4. Step 4: Simplify right side
    21,307.60x = 349,211,427.60
  5. Step 5: Solve for x
    x = 349,211,427.60/21,307.60
  6. Step 6: Final answer
    x = 16,389.05

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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.