Home / 39,681.19-54,740.53-28,909.31

Finding the Fourth Proportional to 39,681.19, 54,740.53 and 28,909.31

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Solution

The fourth proportional to 39,681.19, 54,740.53 and 28,909.31 is: 39,880.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,681.19 : 54,740.53 = 28,909.31 : x
  2. Step 2: Convert to fraction form
    39,681.19/54,740.53 = 28,909.31/x
  3. Step 3: Cross multiply
    39,681.19x = 54,740.53 × 28,909.31
  4. Step 4: Simplify right side
    39,681.19x = 1,582,510,795.08
  5. Step 5: Solve for x
    x = 1,582,510,795.08/39,681.19
  6. Step 6: Final answer
    x = 39,880.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.