Home / 20,779.47-28,686.02-12,826.08

Finding the Fourth Proportional to 20,779.47, 28,686.02 and 12,826.08

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Solution

The fourth proportional to 20,779.47, 28,686.02 and 12,826.08 is: 17,706.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.47 : 28,686.02 = 12,826.08 : x
  2. Step 2: Convert to fraction form
    20,779.47/28,686.02 = 12,826.08/x
  3. Step 3: Cross multiply
    20,779.47x = 28,686.02 × 12,826.08
  4. Step 4: Simplify right side
    20,779.47x = 367,929,123.27
  5. Step 5: Solve for x
    x = 367,929,123.27/20,779.47
  6. Step 6: Final answer
    x = 17,706.38

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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.