Home / 42,979.76-64,461-11,810.96

Finding the Fourth Proportional to 42,979.76, 64,461 and 11,810.96

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Solution

The fourth proportional to 42,979.76, 64,461 and 11,810.96 is: 17,714.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,979.76 : 64,461 = 11,810.96 : x
  2. Step 2: Convert to fraction form
    42,979.76/64,461 = 11,810.96/x
  3. Step 3: Cross multiply
    42,979.76x = 64,461 × 11,810.96
  4. Step 4: Simplify right side
    42,979.76x = 761,346,292.56
  5. Step 5: Solve for x
    x = 761,346,292.56/42,979.76
  6. Step 6: Final answer
    x = 17,714.07

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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.