Home / 20,925.06-28,864.34-14,130.78

Finding the Fourth Proportional to 20,925.06, 28,864.34 and 14,130.78

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Solution

The fourth proportional to 20,925.06, 28,864.34 and 14,130.78 is: 19,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.06 : 28,864.34 = 14,130.78 : x
  2. Step 2: Convert to fraction form
    20,925.06/28,864.34 = 14,130.78/x
  3. Step 3: Cross multiply
    20,925.06x = 28,864.34 × 14,130.78
  4. Step 4: Simplify right side
    20,925.06x = 407,875,638.39
  5. Step 5: Solve for x
    x = 407,875,638.39/20,925.06
  6. Step 6: Final answer
    x = 19,492.21

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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.