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Finding the Fourth Proportional to 28,710.99, 42,955.65 and 28,637.15

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Solution

The fourth proportional to 28,710.99, 42,955.65 and 28,637.15 is: 42,845.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,710.99 : 42,955.65 = 28,637.15 : x
  2. Step 2: Convert to fraction form
    28,710.99/42,955.65 = 28,637.15/x
  3. Step 3: Cross multiply
    28,710.99x = 42,955.65 × 28,637.15
  4. Step 4: Simplify right side
    28,710.99x = 1,230,127,177.62
  5. Step 5: Solve for x
    x = 1,230,127,177.62/28,710.99
  6. Step 6: Final answer
    x = 42,845.17

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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.