Home / 20,547.06-28,368.81-13,485.48

Finding the Fourth Proportional to 20,547.06, 28,368.81 and 13,485.48

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Solution

The fourth proportional to 20,547.06, 28,368.81 and 13,485.48 is: 18,619.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.06 : 28,368.81 = 13,485.48 : x
  2. Step 2: Convert to fraction form
    20,547.06/28,368.81 = 13,485.48/x
  3. Step 3: Cross multiply
    20,547.06x = 28,368.81 × 13,485.48
  4. Step 4: Simplify right side
    20,547.06x = 382,567,019.88
  5. Step 5: Solve for x
    x = 382,567,019.88/20,547.06
  6. Step 6: Final answer
    x = 18,619.06

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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.