Home / 19,810.40-29,701.20-8,117.60

Finding the Fourth Proportional to 19,810.40, 29,701.20 and 8,117.60

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Solution

The fourth proportional to 19,810.40, 29,701.20 and 8,117.60 is: 12,170.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,810.40 : 29,701.20 = 8,117.60 : x
  2. Step 2: Convert to fraction form
    19,810.40/29,701.20 = 8,117.60/x
  3. Step 3: Cross multiply
    19,810.40x = 29,701.20 × 8,117.60
  4. Step 4: Simplify right side
    19,810.40x = 241,102,461.12
  5. Step 5: Solve for x
    x = 241,102,461.12/19,810.40
  6. Step 6: Final answer
    x = 12,170.50

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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.