Home / 19,620.60-29,430.90-9,779.10

Finding the Fourth Proportional to 19,620.60, 29,430.90 and 9,779.10

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Solution

The fourth proportional to 19,620.60, 29,430.90 and 9,779.10 is: 14,668.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,620.60 : 29,430.90 = 9,779.10 : x
  2. Step 2: Convert to fraction form
    19,620.60/29,430.90 = 9,779.10/x
  3. Step 3: Cross multiply
    19,620.60x = 29,430.90 × 9,779.10
  4. Step 4: Simplify right side
    19,620.60x = 287,807,714.19
  5. Step 5: Solve for x
    x = 287,807,714.19/19,620.60
  6. Step 6: Final answer
    x = 14,668.65

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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.