Home / 39,870.99-55,041.93-30,898.35

Finding the Fourth Proportional to 39,870.99, 55,041.93 and 30,898.35

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Solution

The fourth proportional to 39,870.99, 55,041.93 and 30,898.35 is: 42,655.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,870.99 : 55,041.93 = 30,898.35 : x
  2. Step 2: Convert to fraction form
    39,870.99/55,041.93 = 30,898.35/x
  3. Step 3: Cross multiply
    39,870.99x = 55,041.93 × 30,898.35
  4. Step 4: Simplify right side
    39,870.99x = 1,700,704,817.82
  5. Step 5: Solve for x
    x = 1,700,704,817.82/39,870.99
  6. Step 6: Final answer
    x = 42,655.19

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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.