Home / 15,779.21-21,774.32-8,705.63

Finding the Fourth Proportional to 15,779.21, 21,774.32 and 8,705.63

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Solution

The fourth proportional to 15,779.21, 21,774.32 and 8,705.63 is: 12,013.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.21 : 21,774.32 = 8,705.63 : x
  2. Step 2: Convert to fraction form
    15,779.21/21,774.32 = 8,705.63/x
  3. Step 3: Cross multiply
    15,779.21x = 21,774.32 × 8,705.63
  4. Step 4: Simplify right side
    15,779.21x = 189,559,094.49
  5. Step 5: Solve for x
    x = 189,559,094.49/15,779.21
  6. Step 6: Final answer
    x = 12,013.22

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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.