Home / 20,368.02-28,107.63-11,415.51

Finding the Fourth Proportional to 20,368.02, 28,107.63 and 11,415.51

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Solution

The fourth proportional to 20,368.02, 28,107.63 and 11,415.51 is: 15,753.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.02 : 28,107.63 = 11,415.51 : x
  2. Step 2: Convert to fraction form
    20,368.02/28,107.63 = 11,415.51/x
  3. Step 3: Cross multiply
    20,368.02x = 28,107.63 × 11,415.51
  4. Step 4: Simplify right side
    20,368.02x = 320,862,931.34
  5. Step 5: Solve for x
    x = 320,862,931.34/20,368.02
  6. Step 6: Final answer
    x = 15,753.27

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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.