Home / 15,852.79-21,877.50-8,779.20

Finding the Fourth Proportional to 15,852.79, 21,877.50 and 8,779.20

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Solution

The fourth proportional to 15,852.79, 21,877.50 and 8,779.20 is: 12,115.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,852.79 : 21,877.50 = 8,779.20 : x
  2. Step 2: Convert to fraction form
    15,852.79/21,877.50 = 8,779.20/x
  3. Step 3: Cross multiply
    15,852.79x = 21,877.50 × 8,779.20
  4. Step 4: Simplify right side
    15,852.79x = 192,066,904.10
  5. Step 5: Solve for x
    x = 192,066,904.10/15,852.79
  6. Step 6: Final answer
    x = 12,115.66

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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.