Home / 15,779.86-21,777.28-9,068.16

Finding the Fourth Proportional to 15,779.86, 21,777.28 and 9,068.16

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Solution

The fourth proportional to 15,779.86, 21,777.28 and 9,068.16 is: 12,514.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.86 : 21,777.28 = 9,068.16 : x
  2. Step 2: Convert to fraction form
    15,779.86/21,777.28 = 9,068.16/x
  3. Step 3: Cross multiply
    15,779.86x = 21,777.28 × 9,068.16
  4. Step 4: Simplify right side
    15,779.86x = 197,479,901.40
  5. Step 5: Solve for x
    x = 197,479,901.40/15,779.86
  6. Step 6: Final answer
    x = 12,514.68

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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.