Home / 21,120.02-29,148.90-12,045.40

Finding the Fourth Proportional to 21,120.02, 29,148.90 and 12,045.40

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Solution

The fourth proportional to 21,120.02, 29,148.90 and 12,045.40 is: 16,624.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.02 : 29,148.90 = 12,045.40 : x
  2. Step 2: Convert to fraction form
    21,120.02/29,148.90 = 12,045.40/x
  3. Step 3: Cross multiply
    21,120.02x = 29,148.90 × 12,045.40
  4. Step 4: Simplify right side
    21,120.02x = 351,110,160.06
  5. Step 5: Solve for x
    x = 351,110,160.06/21,120.02
  6. Step 6: Final answer
    x = 16,624.52

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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.