Home / 10,779.42-14,874.60-9,985.97

Finding the Fourth Proportional to 10,779.42, 14,874.60 and 9,985.97

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Solution

The fourth proportional to 10,779.42, 14,874.60 and 9,985.97 is: 13,779.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,779.42 : 14,874.60 = 9,985.97 : x
  2. Step 2: Convert to fraction form
    10,779.42/14,874.60 = 9,985.97/x
  3. Step 3: Cross multiply
    10,779.42x = 14,874.60 × 9,985.97
  4. Step 4: Simplify right side
    10,779.42x = 148,537,309.36
  5. Step 5: Solve for x
    x = 148,537,309.36/10,779.42
  6. Step 6: Final answer
    x = 13,779.72

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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.