Home / 28,120.64-38,808.80-15,547.84

Finding the Fourth Proportional to 28,120.64, 38,808.80 and 15,547.84

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Solution

The fourth proportional to 28,120.64, 38,808.80 and 15,547.84 is: 21,457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.64 : 38,808.80 = 15,547.84 : x
  2. Step 2: Convert to fraction form
    28,120.64/38,808.80 = 15,547.84/x
  3. Step 3: Cross multiply
    28,120.64x = 38,808.80 × 15,547.84
  4. Step 4: Simplify right side
    28,120.64x = 603,393,012.99
  5. Step 5: Solve for x
    x = 603,393,012.99/28,120.64
  6. Step 6: Final answer
    x = 21,457.30

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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.