Home / 19,387.40-29,048.70-12,810.20

Finding the Fourth Proportional to 19,387.40, 29,048.70 and 12,810.20

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Solution

The fourth proportional to 19,387.40, 29,048.70 and 12,810.20 is: 19,193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,387.40 : 29,048.70 = 12,810.20 : x
  2. Step 2: Convert to fraction form
    19,387.40/29,048.70 = 12,810.20/x
  3. Step 3: Cross multiply
    19,387.40x = 29,048.70 × 12,810.20
  4. Step 4: Simplify right side
    19,387.40x = 372,119,656.74
  5. Step 5: Solve for x
    x = 372,119,656.74/19,387.40
  6. Step 6: Final answer
    x = 19,193.89

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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.