Home / 52,129.10-78,193.02-12,686.30

Finding the Fourth Proportional to 52,129.10, 78,193.02 and 12,686.30

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Solution

The fourth proportional to 52,129.10, 78,193.02 and 12,686.30 is: 19,029.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,129.10 : 78,193.02 = 12,686.30 : x
  2. Step 2: Convert to fraction form
    52,129.10/78,193.02 = 12,686.30/x
  3. Step 3: Cross multiply
    52,129.10x = 78,193.02 × 12,686.30
  4. Step 4: Simplify right side
    52,129.10x = 991,980,109.63
  5. Step 5: Solve for x
    x = 991,980,109.63/52,129.10
  6. Step 6: Final answer
    x = 19,029.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.