Home / 15,779.04-21,775.03-8,705.40

Finding the Fourth Proportional to 15,779.04, 21,775.03 and 8,705.40

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Solution

The fourth proportional to 15,779.04, 21,775.03 and 8,705.40 is: 12,013.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.04 : 21,775.03 = 8,705.40 : x
  2. Step 2: Convert to fraction form
    15,779.04/21,775.03 = 8,705.40/x
  3. Step 3: Cross multiply
    15,779.04x = 21,775.03 × 8,705.40
  4. Step 4: Simplify right side
    15,779.04x = 189,560,346.16
  5. Step 5: Solve for x
    x = 189,560,346.16/15,779.04
  6. Step 6: Final answer
    x = 12,013.43

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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.