Home / 21,421.80-32,139.74-8,276.20

Finding the Fourth Proportional to 21,421.80, 32,139.74 and 8,276.20

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Solution

The fourth proportional to 21,421.80, 32,139.74 and 8,276.20 is: 12,417.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.80 : 32,139.74 = 8,276.20 : x
  2. Step 2: Convert to fraction form
    21,421.80/32,139.74 = 8,276.20/x
  3. Step 3: Cross multiply
    21,421.80x = 32,139.74 × 8,276.20
  4. Step 4: Simplify right side
    21,421.80x = 265,994,916.19
  5. Step 5: Solve for x
    x = 265,994,916.19/21,421.80
  6. Step 6: Final answer
    x = 12,417.02

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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.