Home / 21,620.39-32,434.48-9,779.76

Finding the Fourth Proportional to 21,620.39, 32,434.48 and 9,779.76

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Solution

The fourth proportional to 21,620.39, 32,434.48 and 9,779.76 is: 14,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.39 : 32,434.48 = 9,779.76 : x
  2. Step 2: Convert to fraction form
    21,620.39/32,434.48 = 9,779.76/x
  3. Step 3: Cross multiply
    21,620.39x = 32,434.48 × 9,779.76
  4. Step 4: Simplify right side
    21,620.39x = 317,201,430.12
  5. Step 5: Solve for x
    x = 317,201,430.12/21,620.39
  6. Step 6: Final answer
    x = 14,671.40

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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.