Home / 42,791.60-64,187.40-13,206.80

Finding the Fourth Proportional to 42,791.60, 64,187.40 and 13,206.80

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Solution

The fourth proportional to 42,791.60, 64,187.40 and 13,206.80 is: 19,810.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,791.60 : 64,187.40 = 13,206.80 : x
  2. Step 2: Convert to fraction form
    42,791.60/64,187.40 = 13,206.80/x
  3. Step 3: Cross multiply
    42,791.60x = 64,187.40 × 13,206.80
  4. Step 4: Simplify right side
    42,791.60x = 847,710,154.32
  5. Step 5: Solve for x
    x = 847,710,154.32/42,791.60
  6. Step 6: Final answer
    x = 19,810.20

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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.