Home / 21,124.40-29,148.40-12,172.32

Finding the Fourth Proportional to 21,124.40, 29,148.40 and 12,172.32

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Solution

The fourth proportional to 21,124.40, 29,148.40 and 12,172.32 is: 16,795.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.40 : 29,148.40 = 12,172.32 : x
  2. Step 2: Convert to fraction form
    21,124.40/29,148.40 = 12,172.32/x
  3. Step 3: Cross multiply
    21,124.40x = 29,148.40 × 12,172.32
  4. Step 4: Simplify right side
    21,124.40x = 354,803,652.29
  5. Step 5: Solve for x
    x = 354,803,652.29/21,124.40
  6. Step 6: Final answer
    x = 16,795.92

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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.