Home / 15,475.65-21,307.83-13,656.80

Finding the Fourth Proportional to 15,475.65, 21,307.83 and 13,656.80

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Solution

The fourth proportional to 15,475.65, 21,307.83 and 13,656.80 is: 18,803.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475.65 : 21,307.83 = 13,656.80 : x
  2. Step 2: Convert to fraction form
    15,475.65/21,307.83 = 13,656.80/x
  3. Step 3: Cross multiply
    15,475.65x = 21,307.83 × 13,656.80
  4. Step 4: Simplify right side
    15,475.65x = 290,996,666.20
  5. Step 5: Solve for x
    x = 290,996,666.20/15,475.65
  6. Step 6: Final answer
    x = 18,803.52

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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.