Home / 19,779.04-27,289.88-12,715.12

Finding the Fourth Proportional to 19,779.04, 27,289.88 and 12,715.12

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Solution

The fourth proportional to 19,779.04, 27,289.88 and 12,715.12 is: 17,543.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.04 : 27,289.88 = 12,715.12 : x
  2. Step 2: Convert to fraction form
    19,779.04/27,289.88 = 12,715.12/x
  3. Step 3: Cross multiply
    19,779.04x = 27,289.88 × 12,715.12
  4. Step 4: Simplify right side
    19,779.04x = 346,994,098.99
  5. Step 5: Solve for x
    x = 346,994,098.99/19,779.04
  6. Step 6: Final answer
    x = 17,543.53

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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.