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Finding the Fourth Proportional to 42,987.49, 64,457.99 and 14,905.49

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Solution

The fourth proportional to 42,987.49, 64,457.99 and 14,905.49 is: 22,350.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,987.49 : 64,457.99 = 14,905.49 : x
  2. Step 2: Convert to fraction form
    42,987.49/64,457.99 = 14,905.49/x
  3. Step 3: Cross multiply
    42,987.49x = 64,457.99 × 14,905.49
  4. Step 4: Simplify right side
    42,987.49x = 960,777,925.37
  5. Step 5: Solve for x
    x = 960,777,925.37/42,987.49
  6. Step 6: Final answer
    x = 22,350.18

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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.